The Basement Collection is a compilation of flash titles by game designer Edmund McMillen. The games are different in their genres and settings. Especially for the compilation the games were upgraded.
The main collection features seven games: Triachnid, a spider simulator with realistic physics; Coil; Meat Boy, a predecessor to Super Meat Boy, another McMillen’s project; Aether, a space adventure game, Grey-Matter; Spewer and Time Fcuk. Completing these games you will unlock six more titles: The Lonely Hermit, AVGM, Meat Boy map pack, The Box, Thicker Than Water and The Cheats. Four additional games can be found under steamapps/common/basement/moregames.
In fact, The Basement Collection is the compilation of McMillen’s early works that show his unconventional mind and creativity. Many ideas and experiments held with these titles got their continuation in McMillen’s most successful works: Super Meat Boy and The Binding of Isaac.