7. Guilty Gear XX Accent Core (2006)

BlazBlue devs Arc System Works are also responsible for the Guilty Gear series, which is phenomenally popular in Japan, but also has a strong cult following around the world. Guilty Gear is instantly recognisable for it's looks, but also a unique button layout and combo system comprising of kick, punch, slash, hard slash and dust (a launcher attack of sorts). Fighting fans should certainly apply, but don't expect an easy learning curve, Guilty Gear is fiendish.