Iron Storm and solely for the gameplay decisions of the devs. It's a somewhat competent shooter that is absolutely joyless as if by design.
>starts out and luls you into fake sense of security
>plaza with a gazillion snipers
>turrets that you can't destroy and they keep shooting your ass
>invincible enemies that shoot rockets and instagib you
>a tight corridor with both of these
>the game throws you a stealth segment and being detected happens arbitrarily
>the game wants you to do an even longer stealth segment in black mesa type map where you have to essentially play the map twice, first by stealth then by shooting
>a foggy map full of snipers that shoot you as soon as they're rendered
>a train map that changes the rules about the invincible turrets, now you can suddenly destroy them
>a stronghold map full of where-the-do-I-goan