For those of you who still haven't bought HL2, why the hell not? The deathmatch is worth the admission price alone. While there are currently only two maps, dm_overwatch is so fantastic you won't even care. The gravity gun adds a whole new dimension to the game. dm_overwatch has a basement room full of filing cabinets and shelves and boxes and stuff, and it's awesome fun playing dodgeball with all the stuff in there.

To put this in perspective, consider that that particular room also contains a very powerful machinegun which nobody ever uses because it's so much more fun to kill people with a chair.

Oh, also, I pwn at HL2DM. So there.