Indigo Prophecy.
Before that, Supreme Commander (all 3 factions).
Before that, Turok (which I followed up with by promptly ERASING from my computer, most mediocre shooter I've ever seen).
Before that, Crysis.
Before that, I successfully finished a race in Nascar Simracing with mechanical failures on, 7x gas usage/tire wear, with immunity off, steering help off, autopit/pace off, etc, and a full 100% lapcount on Daytona. Basically the hardest I could set it to - prolly my biggest achievement yet given that I tend to drive aggressive (lotsa flying tires, flying curses, and with those settings I usually made about 3 laps before suspension blew out).
Aaaaand before that, FEAR and FEAR Extraction Point again.
Aaaaaaaaaaaaaand before THAT, Need for Speed: Most Wanted.
I need to get a life. I shouldn't be able to recall these IN THAT ORDER