Politeia said:
Ahh, I see, off the top of my head would be the white phosphorous scene from Spec Ops; there were some hints that things weren't alright earlier in the game but that scene set the tone for how dark things were really going to get.
Have to agree. I mean, sure, by the time i got the game i knew something would be off, since every single critic was screaming something about something they did not expect and how everyone should avoid spoilers of that game, at all costs. But yeah, still did not expect that, and it really did leave a bad taste in my mouth. In a good way, i guess. But yeah, it still surprised me.
Some other ones that really surprised me (and that have mostly mentioned in this thread already):
The ending of Assassin`s Creed 2. I really liked it, as well.
Portal 2 did quite a few things that took me off guard.
I´m quite sure a lot more games did stuff like that, but can`t really remember any at the moment. Still, i quite love it when such surprises happen. Good fun, and all that!