Not much, pretty much anything built after 2008 should run the game fine, though I will warn that it does lag a tinsy bit with all the lasers and what not going around. It's not really bad, but in huge battles (especially how I have it set up with 250 unit points on each side) it gets a little choppy, but like 15 fps lowest with even those scales, and I use a craptop from 2012.