As of 2020, this game still holds up so goddamn well. Played through the first level a year ago at a friend's house. It was a basic 'kill all baddies holed up somewhere' situation. The game is absurdly realistic, featuring one of the best peeking mechanics I've ever seen and a level of tactical player choice I've definetly never seen before. One by one I killed the baddies and one by one my teammates died. It culminated in me needing to hunt down the last bad guy after storming a room with two baddies, using only an AK and a flashbang. At the end of my confrontation with the last baddie I was literally sweating. What a game!