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+## Game
+
+**Responsibilities**
+- Tracks the score
+- Tracks the players involved
+- Holds the date when event took place
+- Manages the price to play
+
+**Collaborators**
+- Users
+- Friend
+- Currency
+
+## User
+
+**Responsibilities**
+- Stores personal information about a person
+- Stores how much currency a user has available
+- Holds the userId
+- Holds the avatar
+
+**Collaborators**
+- Friend
+
+## Friend
+
+**Responsibilities**
+- Links multiple users together.
+- Holds a Friendship ID with status and metadata info.
+
+**Collaborators**
+- User
+- Notification (Inbox)
+- Conversation
+
+## Conversation
+
+**Responsibilities**
+- Allow multiple users to communicate with each other simultaneously.
+- Contain 2 or more users.
+- Has a title and a logo.
+- Updates read status of messages exchanged.
+
+**Collaborators**
+- User
+- Message
+- WebSocket
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