Probably my most niche-within-a-niche fascination, the visual and physical forms achievement systems take are numerous and curious. TBC, have to add images. Videogame examples in italics.
So far, I've seen systems drawing on the forms of:
Badges
-Geocaching Badgegen (unofficial)
-Animal Crossing: New Leaf
-Pokémon Go
-Spore
Embroidered patches
-Scouting badges
-Activision high score patches
Star anchor plates
-Wikipedia Barnstars (also featured in many of the medals)
Stickers
Medals
-Wikipedia: mainly Service awards, Administrative service awards and Barnstars of National Merit
-Bloons TD 6
-Arknights
Coins
-Pokémon Trading Card Game (1998), Pokémon Trading Card Game 2: The Invasion of Team GR!
Military ribbons
-ribbon forms of Wikipedia awards
-Planetside
Ink stamps
-Tower Unite
Post stamps
-Club Penguin
Buttons (fastening)
-třináct bobříků
Image tiles
-Kid Icarus: Uprising
Random treasures
-Monster Hunter