Well...it's no Crysis, but at least it's got two players. I guess it's the first multiplayer game ever made, and the second game ever! Cool, but you can't help not to feel nostalgic

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!