diff --git a/.github/workflows/leaderboard_repository.yaml b/.github/workflows/leaderboard_repository.yaml
new file mode 100644
index 00000000..6eddf283
--- /dev/null
+++ b/.github/workflows/leaderboard_repository.yaml
@@ -0,0 +1,18 @@
+name: leaderboard_repository
+
+on:
+  push:
+    paths:
+      - "packages/leaderboard_repository/**"
+      - ".github/workflows/leaderboard_repository.yaml"
+
+  pull_request:
+    paths:
+      - "packages/leaderboard_repository/**"
+      - ".github/workflows/leaderboard_repository.yaml"
+
+jobs:
+  build:
+    uses: VeryGoodOpenSource/very_good_workflows/.github/workflows/flutter_package.yml@v1
+    with:
+      working_directory: packages/leaderboard_repository
diff --git a/packages/leaderboard_repository/.gitignore b/packages/leaderboard_repository/.gitignore
new file mode 100644
index 00000000..d6130351
--- /dev/null
+++ b/packages/leaderboard_repository/.gitignore
@@ -0,0 +1,39 @@
+# Miscellaneous
+*.class
+*.log
+*.pyc
+*.swp
+.DS_Store
+.atom/
+.buildlog/
+.history
+.svn/
+
+# IntelliJ related
+*.iml
+*.ipr
+*.iws
+.idea/
+
+# VSCode related
+.vscode/
+
+# Flutter/Dart/Pub related
+**/doc/api/
+**/ios/Flutter/.last_build_id
+.dart_tool/
+.flutter-plugins
+.flutter-plugins-dependencies
+.packages
+.pub-cache/
+.pub/
+/build/
+
+# Web related
+lib/generated_plugin_registrant.dart
+
+# Symbolication related
+app.*.symbols
+
+# Obfuscation related
+app.*.map.json
diff --git a/packages/leaderboard_repository/README.md b/packages/leaderboard_repository/README.md
new file mode 100644
index 00000000..c3123fe0
--- /dev/null
+++ b/packages/leaderboard_repository/README.md
@@ -0,0 +1,11 @@
+# leaderboard_repository
+
+[![style: very good analysis][very_good_analysis_badge]][very_good_analysis_link]
+[![License: MIT][license_badge]][license_link]
+
+Repository to access leaderboard data in Firebase Cloud Firestore.
+
+[license_badge]: https://img.shields.io/badge/license-MIT-blue.svg
+[license_link]: https://opensource.org/licenses/MIT
+[very_good_analysis_badge]: https://img.shields.io/badge/style-very_good_analysis-B22C89.svg
+[very_good_analysis_link]: https://pub.dev/packages/very_good_analysis
\ No newline at end of file
diff --git a/packages/leaderboard_repository/analysis_options.yaml b/packages/leaderboard_repository/analysis_options.yaml
new file mode 100644
index 00000000..3742fc3d
--- /dev/null
+++ b/packages/leaderboard_repository/analysis_options.yaml
@@ -0,0 +1 @@
+include: package:very_good_analysis/analysis_options.2.4.0.yaml
\ No newline at end of file
diff --git a/packages/leaderboard_repository/lib/leaderboard_repository.dart b/packages/leaderboard_repository/lib/leaderboard_repository.dart
new file mode 100644
index 00000000..d299569a
--- /dev/null
+++ b/packages/leaderboard_repository/lib/leaderboard_repository.dart
@@ -0,0 +1,4 @@
+library leaderboard_repository;
+
+export 'src/leaderboard_repository.dart';
+export 'src/models/models.dart';
diff --git a/packages/leaderboard_repository/lib/src/leaderboard_repository.dart b/packages/leaderboard_repository/lib/src/leaderboard_repository.dart
new file mode 100644
index 00000000..5a578358
--- /dev/null
+++ b/packages/leaderboard_repository/lib/src/leaderboard_repository.dart
@@ -0,0 +1,152 @@
+import 'package:cloud_firestore/cloud_firestore.dart';
+import 'package:leaderboard_repository/leaderboard_repository.dart';
+
+/// {@template leaderboard_exception}
+/// Base exception for leaderboard repository failures.
+/// {@endtemplate}
+abstract class LeaderboardException implements Exception {
+  /// {@macro leaderboard_exception}
+  const LeaderboardException(this.error, this.stackTrace);
+
+  /// The error that was caught.
+  final Object error;
+
+  /// The Stacktrace associated with the [error].
+  final StackTrace stackTrace;
+}
+
+/// {@template leaderboard_deserialization_exception}
+/// Exception thrown when leaderboard data cannot be deserialized in the
+/// expected way.
+/// {@endtemplate}
+class LeaderboardDeserializationException extends LeaderboardException {
+  /// {@macro leaderboard_deserialization_exception}
+  const LeaderboardDeserializationException(
+    Object error,
+    StackTrace stackTrace,
+  ) : super(
+          error,
+          stackTrace,
+        );
+}
+
+/// {@template fetch_top_10_leaderboard_exception}
+/// Exception thrown when failure occurs while fetching top 10 leaderboard.
+/// {@endtemplate}
+class FetchTop10LeaderboardException extends LeaderboardException {
+  /// {@macro fetch_top_10_leaderboard_exception}
+  const FetchTop10LeaderboardException(
+    Object error,
+    StackTrace stackTrace,
+  ) : super(
+          error,
+          stackTrace,
+        );
+}
+
+/// {@template add_leaderboard_entry_exception}
+/// Exception thrown when failure occurs while adding entry to leaderboard.
+/// {@endtemplate}
+class AddLeaderboardEntryException extends LeaderboardException {
+  /// {@macro add_leaderboard_entry_exception}
+  const AddLeaderboardEntryException(
+    Object error,
+    StackTrace stackTrace,
+  ) : super(
+          error,
+          stackTrace,
+        );
+}
+
+/// {@template fetch_player_ranking_exception}
+/// Exception thrown when failure occurs while fetching player ranking.
+/// {@endtemplate}
+class FetchPlayerRankingException extends LeaderboardException {
+  /// {@macro fetch_player_ranking_exception}
+  const FetchPlayerRankingException(
+    Object error,
+    StackTrace stackTrace,
+  ) : super(
+          error,
+          stackTrace,
+        );
+}
+
+/// {@template leaderboard_repository}
+/// Repository to access leaderboard data in Firebase Cloud Firestore.
+/// {@endtemplate}
+class LeaderboardRepository {
+  /// {@macro leaderboard_repository}
+  const LeaderboardRepository(
+    FirebaseFirestore firebaseFirestore,
+  ) : _firebaseFirestore = firebaseFirestore;
+
+  final FirebaseFirestore _firebaseFirestore;
+
+  /// Acquires top 10 [LeaderboardEntry]s.
+  Future<List<LeaderboardEntry>> fetchTop10Leaderboard() async {
+    final leaderboardEntries = <LeaderboardEntry>[];
+    late List<QueryDocumentSnapshot> documents;
+
+    try {
+      final querySnapshot = await _firebaseFirestore
+          .collection('leaderboard')
+          .orderBy('score')
+          .limit(10)
+          .get();
+      documents = querySnapshot.docs;
+    } on Exception catch (error, stackTrace) {
+      throw FetchTop10LeaderboardException(error, stackTrace);
+    }
+
+    for (final document in documents) {
+      final data = document.data() as Map<String, dynamic>?;
+      if (data != null) {
+        try {
+          leaderboardEntries.add(LeaderboardEntry.fromJson(data));
+        } catch (error, stackTrace) {
+          throw LeaderboardDeserializationException(error, stackTrace);
+        }
+      }
+    }
+
+    return leaderboardEntries;
+  }
+
+  /// Adds player's score entry to the leaderboard and gets their
+  /// [LeaderboardRanking].
+  Future<LeaderboardRanking> addLeaderboardEntry(LeaderboardEntry entry) async {
+    late DocumentReference entryReference;
+    try {
+      entryReference = await _firebaseFirestore
+          .collection('leaderboard')
+          .add(entry.toJson());
+    } on Exception catch (error, stackTrace) {
+      throw AddLeaderboardEntryException(error, stackTrace);
+    }
+
+    try {
+      final querySnapshot = await _firebaseFirestore
+          .collection('leaderboard')
+          .orderBy('score')
+          .get();
+
+      final documents = querySnapshot.docs;
+      final ranking = documents.indexWhere(
+            (document) => document.id == entryReference.id,
+          ) +
+          1;
+
+      if (ranking > 0) {
+        return LeaderboardRanking(ranking: ranking, outOf: documents.length);
+      } else {
+        throw FetchPlayerRankingException(
+          'Player score could not be found and ranking cannot be provided.',
+          StackTrace.current,
+        );
+      }
+    } on Exception catch (error, stackTrace) {
+      throw FetchPlayerRankingException(error, stackTrace);
+    }
+  }
+}
diff --git a/packages/leaderboard_repository/lib/src/models/leaderboard_entry.dart b/packages/leaderboard_repository/lib/src/models/leaderboard_entry.dart
new file mode 100644
index 00000000..16c17fb0
--- /dev/null
+++ b/packages/leaderboard_repository/lib/src/models/leaderboard_entry.dart
@@ -0,0 +1,83 @@
+import 'package:equatable/equatable.dart';
+import 'package:json_annotation/json_annotation.dart';
+
+part 'leaderboard_entry.g.dart';
+
+/// Google character type associated with a [LeaderboardEntry].
+enum CharacterType {
+  /// Dash character.
+  dash,
+
+  /// Sparky character.
+
+  sparky,
+
+  /// Android character.
+
+  android,
+
+  /// Dino character.
+
+  dino,
+}
+
+/// {@template leaderboard_entry}
+/// A model representing a leaderboard entry containing the player's initials,
+/// score, and chosen character.
+///
+/// Stored in Firestore `leaderboard` collection.
+///
+/// Example:
+/// ```json
+/// {
+///   "playerInitials" : "ABC",
+///   "score" : 1500,
+///   "character" : "dash"
+/// }
+/// ```
+/// {@endtemplate}
+@JsonSerializable()
+class LeaderboardEntry extends Equatable {
+  /// {@macro leaderboard_entry}
+  const LeaderboardEntry({
+    required this.playerInitials,
+    required this.score,
+    required this.character,
+  });
+
+  /// Factory which converts a [Map] into a [LeaderboardEntry].
+  factory LeaderboardEntry.fromJson(Map<String, dynamic> json) {
+    return _$LeaderboardEntryFromJson(json);
+  }
+
+  /// Converts the [LeaderboardEntry] to [Map].
+  Map<String, dynamic> toJson() => _$LeaderboardEntryToJson(this);
+
+  /// Player's chosen initials for [LeaderboardEntry].
+  ///
+  /// Example: 'ABC'.
+  @JsonKey(name: 'playerInitials')
+  final String playerInitials;
+
+  /// Score for [LeaderboardEntry].
+  ///
+  /// Example: 1500.
+  @JsonKey(name: 'score')
+  final int score;
+
+  /// [CharacterType] for [LeaderboardEntry].
+  ///
+  /// Example: [CharacterType.dash].
+  @JsonKey(name: 'character')
+  final CharacterType character;
+
+  /// An empty [LeaderboardEntry] object.
+  static const empty = LeaderboardEntry(
+    playerInitials: '',
+    score: 0,
+    character: CharacterType.dash,
+  );
+
+  @override
+  List<Object?> get props => [playerInitials, score, character];
+}
diff --git a/packages/leaderboard_repository/lib/src/models/leaderboard_entry.g.dart b/packages/leaderboard_repository/lib/src/models/leaderboard_entry.g.dart
new file mode 100644
index 00000000..fc685220
--- /dev/null
+++ b/packages/leaderboard_repository/lib/src/models/leaderboard_entry.g.dart
@@ -0,0 +1,28 @@
+// GENERATED CODE - DO NOT MODIFY BY HAND
+
+part of 'leaderboard_entry.dart';
+
+// **************************************************************************
+// JsonSerializableGenerator
+// **************************************************************************
+
+LeaderboardEntry _$LeaderboardEntryFromJson(Map<String, dynamic> json) =>
+    LeaderboardEntry(
+      playerInitials: json['playerInitials'] as String,
+      score: json['score'] as int,
+      character: $enumDecode(_$CharacterTypeEnumMap, json['character']),
+    );
+
+Map<String, dynamic> _$LeaderboardEntryToJson(LeaderboardEntry instance) =>
+    <String, dynamic>{
+      'playerInitials': instance.playerInitials,
+      'score': instance.score,
+      'character': _$CharacterTypeEnumMap[instance.character],
+    };
+
+const _$CharacterTypeEnumMap = {
+  CharacterType.dash: 'dash',
+  CharacterType.sparky: 'sparky',
+  CharacterType.android: 'android',
+  CharacterType.dino: 'dino',
+};
diff --git a/packages/leaderboard_repository/lib/src/models/leaderboard_ranking.dart b/packages/leaderboard_repository/lib/src/models/leaderboard_ranking.dart
new file mode 100644
index 00000000..7ec90ef4
--- /dev/null
+++ b/packages/leaderboard_repository/lib/src/models/leaderboard_ranking.dart
@@ -0,0 +1,20 @@
+import 'package:equatable/equatable.dart';
+import 'package:leaderboard_repository/leaderboard_repository.dart';
+
+/// {@template leaderboard_ranking}
+/// Contains [ranking] for a single [LeaderboardEntry] and the number of players
+/// the [ranking] is [outOf].
+/// {@endtemplate}
+class LeaderboardRanking extends Equatable {
+  /// {@macro leaderboard_ranking}
+  const LeaderboardRanking({required this.ranking, required this.outOf});
+
+  /// Place ranking by score for a [LeaderboardEntry].
+  final int ranking;
+
+  /// Number of [LeaderboardEntry]s at the time of score entry.
+  final int outOf;
+
+  @override
+  List<Object> get props => [ranking, outOf];
+}
diff --git a/packages/leaderboard_repository/lib/src/models/models.dart b/packages/leaderboard_repository/lib/src/models/models.dart
new file mode 100644
index 00000000..3dabe2bf
--- /dev/null
+++ b/packages/leaderboard_repository/lib/src/models/models.dart
@@ -0,0 +1,2 @@
+export 'leaderboard_entry.dart';
+export 'leaderboard_ranking.dart';
diff --git a/packages/leaderboard_repository/pubspec.yaml b/packages/leaderboard_repository/pubspec.yaml
new file mode 100644
index 00000000..1d3869f4
--- /dev/null
+++ b/packages/leaderboard_repository/pubspec.yaml
@@ -0,0 +1,23 @@
+name: leaderboard_repository
+description: Repository to access leaderboard data in Firebase Cloud Firestore.
+version: 1.0.0+1
+publish_to: none
+
+environment:
+  sdk: ">=2.16.0 <3.0.0"
+
+dependencies:
+  cloud_firestore: ^3.1.10
+  equatable: ^2.0.3
+  flutter:
+    sdk: flutter
+  json_annotation: ^4.4.0
+
+dev_dependencies:
+  build_runner: ^2.1.8
+  flutter_test:
+    sdk: flutter
+  json_serializable: ^6.1.5
+  mocktail: ^0.2.0
+  test: ^1.19.2
+  very_good_analysis: ^2.4.0
\ No newline at end of file
diff --git a/packages/leaderboard_repository/test/src/leaderboard_repository_test.dart b/packages/leaderboard_repository/test/src/leaderboard_repository_test.dart
new file mode 100644
index 00000000..cd632638
--- /dev/null
+++ b/packages/leaderboard_repository/test/src/leaderboard_repository_test.dart
@@ -0,0 +1,226 @@
+// ignore_for_file: prefer_const_constructors, subtype_of_sealed_class
+
+import 'package:cloud_firestore/cloud_firestore.dart';
+import 'package:leaderboard_repository/leaderboard_repository.dart';
+import 'package:mocktail/mocktail.dart';
+import 'package:test/test.dart';
+
+class MockFirebaseFirestore extends Mock implements FirebaseFirestore {}
+
+class MockCollectionReference extends Mock
+    implements CollectionReference<Map<String, dynamic>> {}
+
+class MockQuery extends Mock implements Query<Map<String, dynamic>> {}
+
+class MockQuerySnapshot extends Mock
+    implements QuerySnapshot<Map<String, dynamic>> {}
+
+class MockQueryDocumentSnapshot extends Mock
+    implements QueryDocumentSnapshot<Map<String, dynamic>> {}
+
+class MockDocumentReference extends Mock
+    implements DocumentReference<Map<String, dynamic>> {}
+
+void main() {
+  group('LeaderboardRepository', () {
+    late FirebaseFirestore firestore;
+
+    setUp(() {
+      firestore = MockFirebaseFirestore();
+    });
+
+    test('can be instantiated', () {
+      expect(LeaderboardRepository(firestore), isNotNull);
+    });
+
+    group('fetchTop10Leaderboard', () {
+      late LeaderboardRepository leaderboardRepository;
+      late CollectionReference<Map<String, dynamic>> collectionReference;
+      late Query<Map<String, dynamic>> query;
+      late QuerySnapshot<Map<String, dynamic>> querySnapshot;
+      late List<QueryDocumentSnapshot<Map<String, dynamic>>>
+          queryDocumentSnapshots;
+
+      final top10Scores = [
+        2500,
+        2200,
+        2200,
+        2000,
+        1800,
+        1400,
+        1300,
+        1000,
+        600,
+        300,
+        100,
+      ];
+
+      final top10Leaderboard = top10Scores
+          .map(
+            (score) => LeaderboardEntry(
+              playerInitials: 'user$score',
+              score: score,
+              character: CharacterType.dash,
+            ),
+          )
+          .toList();
+
+      setUp(() {
+        leaderboardRepository = LeaderboardRepository(firestore);
+        collectionReference = MockCollectionReference();
+        query = MockQuery();
+        querySnapshot = MockQuerySnapshot();
+        queryDocumentSnapshots = top10Scores.map((score) {
+          final queryDocumentSnapshot = MockQueryDocumentSnapshot();
+          when(queryDocumentSnapshot.data).thenReturn(<String, dynamic>{
+            'character': 'dash',
+            'playerInitials': 'user$score',
+            'score': score
+          });
+          return queryDocumentSnapshot;
+        }).toList();
+
+        when(() => firestore.collection('leaderboard'))
+            .thenAnswer((_) => collectionReference);
+        when(() => collectionReference.orderBy('score'))
+            .thenAnswer((_) => query);
+        when(() => query.limit(10)).thenAnswer((_) => query);
+        when(query.get).thenAnswer((_) async => querySnapshot);
+        when(() => querySnapshot.docs).thenReturn(queryDocumentSnapshots);
+      });
+
+      test(
+          'returns top 10 entries when '
+          'retrieving information from firestore succeeds', () async {
+        final top10LeaderboardResults =
+            await leaderboardRepository.fetchTop10Leaderboard();
+
+        expect(top10LeaderboardResults, equals(top10Leaderboard));
+      });
+
+      test(
+          'throws FetchTop10LeaderboardException when Exception occurs '
+          'when trying to retrieve information from firestore', () async {
+        when(() => firestore.collection('leaderboard')).thenThrow(Exception());
+
+        expect(
+          () => leaderboardRepository.fetchTop10Leaderboard(),
+          throwsA(isA<FetchTop10LeaderboardException>()),
+        );
+      });
+
+      test(
+          'throws LeaderboardDeserializationException when Exception occurs '
+          'during deserialization', () async {
+        final top10LeaderboardDataMalformed = <String, dynamic>{
+          'playerInitials': 'ABC',
+          'score': 1500,
+        };
+        final queryDocumentSnapshot = MockQueryDocumentSnapshot();
+        when(() => querySnapshot.docs).thenReturn([queryDocumentSnapshot]);
+        when(queryDocumentSnapshot.data)
+            .thenReturn(top10LeaderboardDataMalformed);
+
+        expect(
+          () => leaderboardRepository.fetchTop10Leaderboard(),
+          throwsA(isA<LeaderboardDeserializationException>()),
+        );
+      });
+    });
+
+    group('addLeaderboardEntry', () {
+      late LeaderboardRepository leaderboardRepository;
+      late CollectionReference<Map<String, dynamic>> collectionReference;
+      late DocumentReference<Map<String, dynamic>> documentReference;
+      late Query<Map<String, dynamic>> query;
+      late QuerySnapshot<Map<String, dynamic>> querySnapshot;
+      late List<QueryDocumentSnapshot<Map<String, dynamic>>>
+          queryDocumentSnapshots;
+
+      const entryScore = 1500;
+      final leaderboardScores = [
+        2500,
+        2200,
+        entryScore,
+        1000,
+      ];
+      final leaderboardEntry = LeaderboardEntry(
+        playerInitials: 'ABC',
+        score: entryScore,
+        character: CharacterType.dash,
+      );
+      const entryDocumentId = 'id$entryScore';
+      final ranking = LeaderboardRanking(ranking: 3, outOf: 4);
+
+      setUp(() {
+        leaderboardRepository = LeaderboardRepository(firestore);
+        collectionReference = MockCollectionReference();
+        documentReference = MockDocumentReference();
+        query = MockQuery();
+        querySnapshot = MockQuerySnapshot();
+        queryDocumentSnapshots = leaderboardScores.map((score) {
+          final queryDocumentSnapshot = MockQueryDocumentSnapshot();
+          when(queryDocumentSnapshot.data).thenReturn(<String, dynamic>{
+            'character': 'dash',
+            'username': 'user$score',
+            'score': score
+          });
+          when(() => queryDocumentSnapshot.id).thenReturn('id$score');
+          return queryDocumentSnapshot;
+        }).toList();
+
+        when(() => firestore.collection('leaderboard'))
+            .thenAnswer((_) => collectionReference);
+        when(() => collectionReference.add(any()))
+            .thenAnswer((_) async => documentReference);
+        when(() => collectionReference.orderBy('score'))
+            .thenAnswer((_) => query);
+        when(query.get).thenAnswer((_) async => querySnapshot);
+        when(() => querySnapshot.docs).thenReturn(queryDocumentSnapshots);
+        when(() => documentReference.id).thenReturn(entryDocumentId);
+      });
+
+      test(
+          'adds leaderboard entry and returns player ranking when '
+          'firestore operations succeed', () async {
+        final rankingResult =
+            await leaderboardRepository.addLeaderboardEntry(leaderboardEntry);
+
+        expect(rankingResult, equals(ranking));
+      });
+
+      test(
+          'throws AddLeaderboardEntryException when Exception occurs '
+          'when trying to add entry to firestore', () async {
+        when(() => firestore.collection('leaderboard')).thenThrow(Exception());
+
+        expect(
+          () => leaderboardRepository.addLeaderboardEntry(leaderboardEntry),
+          throwsA(isA<AddLeaderboardEntryException>()),
+        );
+      });
+
+      test(
+          'throws FetchPlayerRankingException when Exception occurs '
+          'when trying to retrieve information from firestore', () async {
+        when(() => collectionReference.orderBy('score')).thenThrow(Exception());
+
+        expect(
+          () => leaderboardRepository.addLeaderboardEntry(leaderboardEntry),
+          throwsA(isA<FetchPlayerRankingException>()),
+        );
+      });
+
+      test(
+          'throws FetchPlayerRankingException when score cannot be found '
+          'in firestore leaderboard data', () async {
+        when(() => documentReference.id).thenReturn('nonexistentDocumentId');
+
+        expect(
+          () => leaderboardRepository.addLeaderboardEntry(leaderboardEntry),
+          throwsA(isA<FetchPlayerRankingException>()),
+        );
+      });
+    });
+  });
+}
diff --git a/packages/leaderboard_repository/test/src/models/leaderboard_entry_test.dart b/packages/leaderboard_repository/test/src/models/leaderboard_entry_test.dart
new file mode 100644
index 00000000..21056529
--- /dev/null
+++ b/packages/leaderboard_repository/test/src/models/leaderboard_entry_test.dart
@@ -0,0 +1,41 @@
+import 'package:leaderboard_repository/leaderboard_repository.dart';
+import 'package:test/test.dart';
+
+void main() {
+  group('LeaderboardEntry', () {
+    const data = <String, dynamic>{
+      'playerInitials': 'ABC',
+      'score': 1500,
+      'character': 'dash',
+    };
+
+    const leaderboardEntry = LeaderboardEntry(
+      playerInitials: 'ABC',
+      score: 1500,
+      character: CharacterType.dash,
+    );
+
+    test('can be instantiated', () {
+      const leaderboardEntry = LeaderboardEntry.empty;
+
+      expect(leaderboardEntry, isNotNull);
+    });
+
+    test('supports value equality.', () {
+      const leaderboardEntry = LeaderboardEntry.empty;
+      const leaderboardEntry2 = LeaderboardEntry.empty;
+
+      expect(leaderboardEntry, equals(leaderboardEntry2));
+    });
+
+    test('can be converted to json', () {
+      expect(leaderboardEntry.toJson(), equals(data));
+    });
+
+    test('can be obtained from json', () {
+      final leaderboardEntryFrom = LeaderboardEntry.fromJson(data);
+
+      expect(leaderboardEntry, equals(leaderboardEntryFrom));
+    });
+  });
+}
diff --git a/packages/leaderboard_repository/test/src/models/leaderboard_ranking_test.dart b/packages/leaderboard_repository/test/src/models/leaderboard_ranking_test.dart
new file mode 100644
index 00000000..577251e4
--- /dev/null
+++ b/packages/leaderboard_repository/test/src/models/leaderboard_ranking_test.dart
@@ -0,0 +1,19 @@
+import 'package:leaderboard_repository/leaderboard_repository.dart';
+import 'package:test/test.dart';
+
+void main() {
+  group('LeaderboardRanking', () {
+    test('can be instantiated', () {
+      const leaderboardRanking = LeaderboardRanking(ranking: 1, outOf: 1);
+
+      expect(leaderboardRanking, isNotNull);
+    });
+
+    test('supports value equality.', () {
+      const leaderboardRanking = LeaderboardRanking(ranking: 1, outOf: 1);
+      const leaderboardRanking2 = LeaderboardRanking(ranking: 1, outOf: 1);
+
+      expect(leaderboardRanking, equals(leaderboardRanking2));
+    });
+  });
+}
diff --git a/pubspec.lock b/pubspec.lock
index 73d0fc8d..79aa7138 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -78,6 +78,27 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.1.0"
+  cloud_firestore:
+    dependency: transitive
+    description:
+      name: cloud_firestore
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "3.1.10"
+  cloud_firestore_platform_interface:
+    dependency: transitive
+    description:
+      name: cloud_firestore_platform_interface
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "5.5.1"
+  cloud_firestore_web:
+    dependency: transitive
+    description:
+      name: cloud_firestore_web
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.6.10"
   collection:
     dependency: transitive
     description:
@@ -134,6 +155,27 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "6.1.2"
+  firebase_core:
+    dependency: transitive
+    description:
+      name: firebase_core
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.13.1"
+  firebase_core_platform_interface:
+    dependency: transitive
+    description:
+      name: firebase_core_platform_interface
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "4.2.5"
+  firebase_core_web:
+    dependency: transitive
+    description:
+      name: firebase_core_web
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.6.1"
   flame:
     dependency: "direct main"
     description:
@@ -184,6 +226,11 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
+  flutter_web_plugins:
+    dependency: transitive
+    description: flutter
+    source: sdk
+    version: "0.0.0"
   forge2d:
     dependency: transitive
     description:
@@ -246,7 +293,21 @@ packages:
       name: js
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.6.4"
+    version: "0.6.3"
+  json_annotation:
+    dependency: transitive
+    description:
+      name: json_annotation
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "4.4.0"
+  leaderboard_repository:
+    dependency: "direct main"
+    description:
+      path: "packages/leaderboard_repository"
+      relative: true
+    source: path
+    version: "1.0.0+1"
   logging:
     dependency: transitive
     description:
@@ -338,6 +399,13 @@ packages:
       relative: true
     source: path
     version: "1.0.0+1"
+  plugin_platform_interface:
+    dependency: transitive
+    description:
+      name: plugin_platform_interface
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.2"
   pool:
     dependency: transitive
     description:
diff --git a/pubspec.yaml b/pubspec.yaml
index 18905a10..abd78157 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -20,6 +20,8 @@ dependencies:
   geometry:
     path: packages/geometry
   intl: ^0.17.0
+  leaderboard_repository:
+    path: packages/leaderboard_repository
   pinball_theme:
     path: packages/pinball_theme