I beat Rage. Which wasn't very hard. Because at the end they steal directly from Half-Life 2 by giving you a horrifically overpowered weapon and sending you into the mysterious shadowy high-tech government's super-secret doom-fortress. I spent about 15-30 minutes plowing through crowds of mutants with a minigun that shoots ass-rape and then boom. That was it. Game over. Humanity is saved. No new enemies (just a reskin), no major revelations, NO FUCKING FINAL BOSS.
Rage honestly might have the weakest story in any game ever. I mean, your character has absolutely no motivation to do pretty much anything that you do, and the plot basically consists of "Authority bad. Destory authority with ass-rape minigun." I'm sorry, but I refuse to accept "it's just a game" as an excuse for a shitty story. If you want to make a game that arguably has no story, that's one thing. But if you're making me sit through briefings and read text and basically experience something like a story, then make it non-shitty.
Rage is basically fun for an hour or two and then the gameplay gets repetitive and you realize you don't care about anything that's happening. Bad game. Great engine. Poorly optimized for PC. Fuck you, Carmack.
I do have to say that the AI for the ranged enemies was quite good. They take cover intelligently, change cover when you've got them zeroed in or flanked, blindfire when suppressed, and sort-of work as a team. They also animate really well. Gotta commend id on that.