Achievement System with Unlockable Content

[Xaxxoo]

Create comprehensive achievement system with various unlock conditions and rewards.

Tasks:
Design Achievement entity with flexible condition system
Implement achievement condition evaluation engine
Create different achievement types (progress, skill, special events)
Set up achievement notification and celebration system
Implement achievement rarity and special rewards
Create achievement tracking and progress indicators
Set up achievement sharing and social features
Implement retroactive achievement unlocking for existing progress
Create achievement analytics and completion rates tracking
Set up achievement-based content unlocking system

Acceptance Criteria:
Achievements unlock correctly based on various conditions
Achievement system supports complex unlock requirements
Players receive appropriate notifications for unlocked achievements
Achievement progress is visible and motivating
System supports easy addition of new achievements

[clintjeff2]

Hello @Xaxxoo, could you assign me this task? Would create a PR before the end of today.

[yusuftomilola]

Please can i work on this. I am a software developer with multiple years of experience. ETA 1 day