Halo 3 on pc? how, how, howwwwwwwwwwwwwwwwwwwwwww?

[Shakib S]

ther is this video on youtube showing a guy playing halo 3 in his pc. its not fake. its real. the prob is, the guy is speaking in spanish. so i dnt know wat he says. how did he do it? i want 2 do it. plz help me.

http://www.youtube.com/watch?v=Ui-d1E88Skw

 

[Maxx the halo3 fan]

has to be a mod
or a video a guy made and they played the video