E.Y.E DIVINE CYBERMANCY
This game is bonkers. Its AA in its finest, it's a little old... but man it an experience that should be had if you like 40k, cyberpunk and Dues ex (lite). The combat is a power fantasy shooter, matrix like death dealing badassery. It's like a mashup of a ton of stuff, basically think of it as a 40k like fan fic of cyberpunk/scifi from 80s and 90s game.
Really.. it's cheap... its got co'op... up to 32 players..... WHAT ARE YOU WAITING FOR???
I do have to admit I played it years ago and forgot about it, ran across this video today.... now I have to go play again
I would recommend the Syndicate mod they made before this game (did not know they made it but it's fun)