unfortunately Intel graphics chips have crappy support for 3d games. Great for video and such but not much for games. Good news is you can probably get away with a pretty cheap card for those games if you want to play them.
Something like this would probably get you buy
http://www.newegg.com/Product/Produc...82E16814127269
you need to identify what kind of graphics slot you have though, AGP or PCIe x16