Doom III is 4 hours of intensity that tests the structural integrity of your mouse against your grip. That's followed by another four hours of wondering if that's all there is to the game. The last 8 hours are irritation that, unfortunately, that is all there is to the game. Fortunately the last half of the game isn't as bad as it might be - you get the feeling you're reaching a conclusion and the boss fights start happening. The bosses are such a welcome relief from the dreary surprise! attack! Gameplay, I'm not sure if they're actually as fun as they seemed or if I was simply glad to know that I don't have to walk into a room and be attacked by the blatant decoy just to have an imp or revenant teleport in behind me.