[PC] [2000s] 3D top-down shooter

Notable gameplay mechanics: You were a dude throwing rocks (I think) at enemies

Platform(s): PC

Genre: Action

Estimated year of release: Late 90s - early 00s

Other details: I think I remember you needed to collect 3 keys (red, green and blue) to get to the castle in the middle of the map. Also, the game may have been part of a compilation.

Graphics/art style: It was a 3D style. I think it was taking place during night (maybe raining)

Notable characters: I believe you played as a bald guy in a t-shirt