No list of FAST games is complete without Sonic. This game is FAAAAAAAST.

Fast-paced procedurally generated platformer, even with an inbuilt speedrunning mode for true speed.

This game isn't actually fast but it's good and it still has "fast" in the name so it still counts.

This shooter is really fast, ESPECIALLY the multiplayer. Fast as all hell

Balls to the wall, fast fighting game.

Speedrunning modes and goin' fast galore, Rayman Legends is one of the best 2D platformers this generation.

Sonic Transformed is the best racer on Steam, period.