Thanks, but that’s not it.

No. 3 was a third person shooter reminiscent of MDK, with the camera behind the player. I looked up a gameplay video, and Gridrunner is a top-down CTF game.

Other things I remember: the player select screen had a kind of machine/gears aesthetic, and characters you couldn’t select had a red stamp saying Not/Unavailable.

also, the first time I played Unreal I was struck by how much it reminded me of this mystery game, especially the first level on the crashed spaceship, which makes me think that the first/demo levels of the game were set in a grimy futuristic area.

Thanks anyway!