Some time ago, Valve had the only popular physics engine, and used it for their Half-Life 2 series. Now, several years have passed and there are some mass physics engines that can compete with it, and are even better. One example is the Crysis physics engine! Very cool! Enjoy!

You've probably heard of the Halo "movies" Red vs. Blue, made entirely by Halo fans. What would such a movie look like for another popular game...say Portal? Would it look like this? Probably, because it's damn funny!