Vektor Prix is a fast paced combat racing game with a full color vector display. It supports singleplayer and multiplayer, AI bots of varying difficulty, a variety of weapons, entities to interact with, controller support, and gamemodes such as racing, deathmatch or team deathmatch.
I like this a lot. I see no problems with using only the CPU for these models. If you use any fancy effects you will have much better results offloading the work to a GPU but considering the low poly nature of the game you should be fine.
Thanks! :D