Ok, well theres too much to explain about this game for people who don't know, but it's a Half Life 2 mod, and is my current favorite game. Here is the website, you can download it from there (if you have HL2), and it talks about the game. The forums are here, you could find indept tutorials there. The basic premise is that it is an Online multiplayer game, and when there are enough people in a server, 1 is picked to be The Hidden. The others become I.R.I.S., who are pretty much swat team members. The Hidden has 3 pipe bombs, which damage and make the Iris's vision blurry, and can jump very far. Most importantly, he is half invisible, only when he moves he is a small blue. *Warning* This game is violent.