An instant favorite: I found myself hooked between the potential social aspects, sounds/visuals and the sections of the storyline covering the first three games that show while loading takes place. I was surprised to see such an engaging 3D RTS game here on Kongregate. That said, I've not played the first three games at the time this comment was produced but that is more of a testament to how enjoyable I found The Last Stand: Dead Zone to be.
 "The Last Stand: Dead Zone"){kind=icon}