You would need more RAM since the computer is running Vista, and it only comes with 512MB. 1GB or higher would be better for gaming and for running the O.S. For the Celeron D, mine runs Battlefield 2 on the lowest settings, with some lag, but that is probably due to RAM. The Celeron D in this computer has 512 of L2 cache, and a Cedar Mill core, so it will probably run those games decently.