The first was to solve all 20 parts of Subject 16's video, which I did. I found it fun to walk around, and hunt for them. And when I find each one, what do I get rewarded with? A puzzle! And puzzles = more fun.
The second one was to find all 100 feathers in the environment. I did this because I loved the multiple parkour paths to reach each one, and I could spend hours wandering the cities without getting bored.
However, if there's an achievement like, "Kill 1,000,000 people", and I've only killed 2,000 in the course of the game, then **** that.
I don't care about achievements or trophies.
[Edited by H.H.H, 6/20/2010 4:44:34 PM]
I am a completionist and i hate the way they try to force you to go online in regards to achievements, win a ranked game vs another player and that crap.
So in general im not a fan of achievements and like someone else stated only reason why i would do an achievement knowingly, would be a easter egg thing or some ingame reward that is usefull somehow.