Hi! I just got the game Left 4 Dead and am having problems with my video. The game loads quickly, everything is alright until I start a campaign. The audio sounds fine and the environment of the game seems to be okay too. But I can't see no characters, no zombies, the helicopters that flies at the beginning when playing single players don't appear either. I can't see nothing but the ground, buildings and staircase. Not even my gun or info that may appear on the screen that i've never seen. but i see shadows of a couple people. Also, while moving around there are glitches that appear depending where I stand and look at. I tried changing the video settings (resolution, ratio and other things that I've never seen before) and the game crashes or closes itself. Under the advanced setting there are other options that I played around with and nothing came out of it. Any one got any idea of what's going on? I really wanna play!!! Here's my system: MBP Processor: 2.53 GHz Inter Core 2 Dua Memory: 4 GB 1067 MHz Graphics: NVIDIA GeForce 9400M VRAM 256MB I think that covers it... let me know if i missed some info.