A highly addicting, replayable masterpiece with a co-op experience like never before. An instant classic.
Left 4 Dead lives up to it's name, you will be instantly excited when you watch the cinematic introduction the first time you load the game, and you will not be left down afterwards. The PC version is a must if you have a good machine, but if you just want it to work without any mods and with excellent graphics and frame rate, get the xbox version.
There are very few bugs or glitches if you play normally, but if you try to purposely find bugs, you may find a few, but nothing that interupts gameplay. Realism is slightly off when you can shoot your teammate around 15 times before he will fall to the ground, but the regular zombies will die to a single shot to the head, as expected.
A great game, it's relatively cheap, and you should at least play through it a hundred times before Left 4 Dead 2 comes out, in november. Hopefully it will live up to the standard set in Left 4 Dead.