The Warhammer Fantasy 2nd Edition RPG is available at Humble Bundle. It’s a fantastic game using a percentile system, and is an update on the 1st edition rules from the 90’s. It’s definitely worth checking out. You can pay as little as a dollar, and to get everything, it’s only 20 bucks.
And of course, Humble Bundle always supports great charities with your purchases, so you can feel good about yourself while doing it.