Posted Tue Dec 13, 2011 8:20 PM
Quake 4. I originally got it for the 360 on launch day, but was unimpressed with it. It had framerate issues, was difficult (in a bad way), and took for-freakin'-ever to load after dying. It left a bad taste in my mouth, especially considering Perfect Dark Zero was more impressive and played better overall.
A couple of years later, I snagged the PC version for a good price. My opinion on the game changed completely with that one. Higher resolution visuals (naturally), a much smoother framerate, keyboard and mouse controls, and nearly instant load times. It was much more of a joy to play and I still go back to it once in a while. I even revisited the 360 version and finished it without too much trouble. Being familiar with the PC game really helped (that, and turning auto-aim on). It's still the lowest point in the Quake series to me, but it's a solid game that I enjoy these days.