Let's not mince words. Tyrian 2000 was the best PC shoot-em-up of the 90s, and it still holds up remarkably well today. Originally developed as shareware by Eclipse Productions and published by Epic Games, Tyrian 2000 is now available as legit freeware, and every fan of space shooters should check it out. The amount of customization, the hilarious but loving prose, the gorgeous VGA graphics... all of them come together to make a true classic.
Infinity Blade 2 is the reason your iOS device exists (other than all of that non-gaming stuff, of course). It's the deep, compelling, great-looking release that melds the casual and the mainstream gaming ideals together. It seamlessly incorporates a strong fantasy story with role playing elements, upgrades, exploration, and even a hint of hidden objects along with fast-reflexes action that will make you sit up straight to play.