u/EnvironmentalQuit865

I remember having it on a bootleg multigame CD back in like 2008 or so.

It was a 2000s realistic first-person shooter, kind of futuristic, game. I don't remember much but i think at some point in the story your squadmates somehow turn evil and become your enemies (or it's their clones idk) and you have to kill each one as a boss in different missions.

The main character had an orange-ish armor or main weapon. One mission that i can distinctly remember is one where you controlled a submarine. The game also had, i think, a multiplayer mode and one of the maps had a series of ancient ruins floating in space.

Does that ring a bell with anyone?