I've been looking for a game that's from either the Dreamcast or the PS1/PS2, but the only thing I can remember from it is that it was a FPS, it was arena based and the last boss a big D.O.G. (from HL2) like robot or something. I also remember that most "badies" wore black CS:S gas mask suits... And that there was a level with a lava pit and a boost or weapon that was super hard to get to and you needed to make a big jump.
Can't remember much else.
Can't remember much else.