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+## User
+
+**Responsibilities**
+- Register and authenticate into the platform
+- Manage profile settings (avatar, bio, preferences)
+- Send and respond to friend requests
+- View achievements, rewards, and game progress
+
+**Collaborators**
+- Friendship
+- Achievement
+- Reward
+- Game
+
+---
+## Friendship
+
+**Responsibilities**
+- Create and remove friend connections
+- Track friendship status (pending, accepted, blocked)
+- Notify users of friend request updates
+
+**Collaborators**
+- User
+- NotificationService
+
+---
+## Achievement
+
+**Responsibilities**
+- Track user progress toward achievement goals
+- Determine when an achievement is completed
+- Trigger reward distribution when requirements are met
+
+**Collaborators**
+- User
+- Reward
+- Game
+
+---
+## Reward
+
+**Responsibilities**
+- Grant rewards to users upon achievement completion
+- Track reward types (XP, coins, cosmetics)
+- Apply reward rules or multipliers
+
+**Collaborators**
+- User
+- Achievement
+
+---
+## Game
+
+**Responsibilities**
+- Provide metadata (title, genre, developer)
+- Maintain the list of achievements associated with the game
+- Update game information when the catalog changes
+
+**Collaborators**
+- Achievement
+- User
+
+---
+## SupportRequest
+
+**Responsibilities**
+- Create and submit support tickets
+- Track ticket status and updates
+- Route requests to the appropriate support channel
+
+**Collaborators**
+- User
+- SupportService