diff --git a/ConsoleApp/Program.cs b/ConsoleApp/Program.cs
index cf39300..71cdda7 100644
--- a/ConsoleApp/Program.cs
+++ b/ConsoleApp/Program.cs
@@ -1,6 +1,7 @@
 using System;
 using System.Linq;
 using Game.Domain;
+using MongoDB.Driver;
 
 namespace ConsoleApp
 {
@@ -9,11 +10,13 @@ class Program
         private readonly IUserRepository userRepo;
         private readonly IGameRepository gameRepo;
         private readonly Random random = new Random();
+        private readonly string mongoConnectionString = Environment.GetEnvironmentVariable("PROJECT5100_MONGO_CONNECTION_STRING") ?? "mongodb://localhost:27017?maxConnecting=100";
 
         private Program(string[] args)
         {
-            userRepo = new InMemoryUserRepository();
-            gameRepo = new InMemoryGameRepository();
+            var db = new MongoClient(mongoConnectionString).GetDatabase("game");
+            userRepo = new MongoUserRepository(db);
+            gameRepo = new MongoGameRepository(db);
         }
 
         public static void Main(string[] args)
diff --git a/Game/Domain/GameEntity.cs b/Game/Domain/GameEntity.cs
index ec7b5ec..c048836 100644
--- a/Game/Domain/GameEntity.cs
+++ b/Game/Domain/GameEntity.cs
@@ -1,11 +1,13 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using MongoDB.Bson.Serialization.Attributes;
 
 namespace Game.Domain
 {
     public class GameEntity
     {
+        [BsonElement]
         private readonly List<Player> players;
 
         public GameEntity(int turnsCount)
@@ -13,6 +15,7 @@ public GameEntity(int turnsCount)
         {
         }
 
+        [BsonConstructor] 
         public GameEntity(Guid id, GameStatus status, int turnsCount, int currentTurnIndex, List<Player> players)
         {
             Id = id;
@@ -22,6 +25,7 @@ public GameEntity(Guid id, GameStatus status, int turnsCount, int currentTurnInd
             this.players = players;
         }
 
+        [BsonElement]
         public Guid Id
         {
             get;
@@ -29,12 +33,16 @@ public Guid Id
             private set;
         }
 
+        [BsonElement]
         public IReadOnlyList<Player> Players => players.AsReadOnly();
 
+        [BsonElement]
         public int TurnsCount { get; }
 
+        [BsonElement] 
         public int CurrentTurnIndex { get; private set; }
 
+        [BsonElement] 
         public GameStatus Status { get; private set; }
 
         public void AddPlayer(UserEntity user)
@@ -59,6 +67,7 @@ public void Cancel()
                 Status = GameStatus.Canceled;
         }
 
+        [BsonElement] 
         public bool HaveDecisionOfEveryPlayer => Players.All(p => p.Decision.HasValue);
 
         public void SetPlayerDecision(Guid userId, PlayerDecision decision)
diff --git a/Game/Domain/MongoGameRepository.cs b/Game/Domain/MongoGameRepository.cs
index 86873d4..935f7ea 100644
--- a/Game/Domain/MongoGameRepository.cs
+++ b/Game/Domain/MongoGameRepository.cs
@@ -8,38 +8,45 @@ namespace Game.Domain
     public class MongoGameRepository : IGameRepository
     {
         public const string CollectionName = "games";
+        private readonly IMongoCollection<GameEntity> gameCollection;
 
         public MongoGameRepository(IMongoDatabase db)
         {
+            gameCollection = db.GetCollection<GameEntity>(CollectionName);
         }
 
         public GameEntity Insert(GameEntity game)
         {
-            throw new NotImplementedException();
+            gameCollection.InsertOne(game);
+            return game;
         }
 
         public GameEntity FindById(Guid gameId)
         {
-            throw new NotImplementedException();
+            var result = gameCollection.Find(game => game.Id == gameId);
+            return result.FirstOrDefault();
         }
 
         public void Update(GameEntity game)
         {
-            throw new NotImplementedException();
+            gameCollection.ReplaceOne(gameInDb => gameInDb.Id == game.Id, game);
         }
 
         // Возвращает не более чем limit игр со статусом GameStatus.WaitingToStart
         public IList<GameEntity> FindWaitingToStart(int limit)
         {
-            //TODO: Используй Find и Limit
-            throw new NotImplementedException();
+            return gameCollection
+                .Find(game => game.Status == GameStatus.WaitingToStart)
+                .Limit(limit)
+                .ToList();
         }
 
         // Обновляет игру, если она находится в статусе GameStatus.WaitingToStart
         public bool TryUpdateWaitingToStart(GameEntity game)
         {
-            //TODO: Для проверки успешности используй IsAcknowledged и ModifiedCount из результата
-            throw new NotImplementedException();
+            var result = gameCollection
+                .ReplaceOne(gameInDb => gameInDb.Id == game.Id && gameInDb.Status == GameStatus.WaitingToStart, game);
+            return result.IsAcknowledged && result.ModifiedCount != 0;
         }
     }
 }
\ No newline at end of file
diff --git a/Game/Domain/MongoUserRepositoty.cs b/Game/Domain/MongoUserRepositoty.cs
index 51aeba5..e5994b6 100644
--- a/Game/Domain/MongoUserRepositoty.cs
+++ b/Game/Domain/MongoUserRepositoty.cs
@@ -1,5 +1,7 @@
 using System;
 using MongoDB.Driver;
+using System.Linq;
+using MongoDB.Bson;
 
 namespace Game.Domain
 {
@@ -11,43 +13,60 @@ public class MongoUserRepository : IUserRepository
         public MongoUserRepository(IMongoDatabase database)
         {
             userCollection = database.GetCollection<UserEntity>(CollectionName);
+            userCollection.Indexes.CreateOne(new CreateIndexModel<UserEntity>(
+                Builders<UserEntity>.IndexKeys.Ascending(u => u.Login),
+                new CreateIndexOptions { Unique = true }));
         }
 
         public UserEntity Insert(UserEntity user)
         {
-            //TODO: Ищи в документации InsertXXX.
-            throw new NotImplementedException();
+            userCollection.InsertOne(user);
+            return user;
         }
 
         public UserEntity FindById(Guid id)
         {
-            //TODO: Ищи в документации FindXXX
-            throw new NotImplementedException();
+            var result = userCollection.Find(user => user.Id == id);
+            return result.FirstOrDefault();
         }
 
         public UserEntity GetOrCreateByLogin(string login)
         {
-            //TODO: Это Find или Insert
-            throw new NotImplementedException();
+            var searchResult = userCollection.Find(user => user.Login == login).FirstOrDefault();
+            if (searchResult is not null)
+                return searchResult;
+            
+            var userEntity = new UserEntity(Guid.NewGuid())
+            {
+                Login = login
+            };
+            Insert(userEntity);
+            return userEntity;
         }
 
         public void Update(UserEntity user)
         {
-            //TODO: Ищи в документации ReplaceXXX
-            throw new NotImplementedException();
+            userCollection.ReplaceOne(userInDb => userInDb.Id == user.Id, user);
         }
 
         public void Delete(Guid id)
         {
-            throw new NotImplementedException();
+            userCollection.DeleteOne(user => user.Id == id);
         }
 
         // Для вывода списка всех пользователей (упорядоченных по логину)
         // страницы нумеруются с единицы
         public PageList<UserEntity> GetPage(int pageNumber, int pageSize)
         {
-            //TODO: Тебе понадобятся SortBy, Skip и Limit
-            throw new NotImplementedException();
+            var allUsers = userCollection.Find(user => true);
+            var totalCount = userCollection.CountDocuments(user => true);
+            var items = allUsers
+                .SortBy(user => user.Login)    
+                .Skip(pageSize * (pageNumber - 1))
+                .Limit(pageSize)
+                .ToList();
+
+            return new PageList<UserEntity>(items, totalCount, pageNumber, pageSize);
         }
 
         // Не нужно реализовывать этот метод
diff --git a/Game/Domain/Player.cs b/Game/Domain/Player.cs
index 9c4f838..59aadf1 100644
--- a/Game/Domain/Player.cs
+++ b/Game/Domain/Player.cs
@@ -1,4 +1,5 @@
 using System;
+using MongoDB.Bson.Serialization.Attributes;
 
 namespace Game.Domain
 {
@@ -7,17 +8,20 @@ namespace Game.Domain
     /// </summary>
     public class Player
     {
+        [BsonConstructor]
         public Player(Guid userId, string name)
         {
             UserId = userId;
             Name = name;
         }
-
+        
+        [BsonElement]
         public Guid UserId { get; }
 
         /// <summary>
         /// Снэпшот имени игрока на момент старта игры. Считайте, что это такое требование к игре.
         /// </summary>
+        [BsonElement]
         public string Name { get; }
         
         /// <summary>