A "Recent Unlocks" feed showing what friends have achieved.

Grayed-out icons with a "Hint" or progress bar (e.g., "75/100") to create a "completionist" urge.

Use colors to denote difficulty: Bronze (Common), Silver (Rare), Gold (Epic), and Diamond (Legendary).

Allow users to pin their 3 most proud achievements to the top of their public profile. 4. Social & Competition

A real-time celebratory pop-up (haptic feedback + visual "burst") informs the user of the unlock.