I never look at the achievement list prior to buying a game.... I do not care about it for my decision on buying a game.... now that said I do try to get them when they make sens and/or are challenging without beingh completely outside the game itself....
I hate when they do a bunch of stupid collectibles just for the sake of achievement....especially if you don't unlock secrets for the story.... like collect all the blue orbs... or get all the dead pigeons... but beside that nothing I hate that and don't even bother trying to get it.....
now if there is a clear up that level without using weapon, or staying on foot, or in less than 2min stuff like that and they are doable in less than a week of practice I always give them a try....
so yeah I don't try to get all of them... I don't care about them when it comes to the purchase decision.... but I'll try to have the one I like for my bragging rights with my friends and to sometimes to have more fun with a game i finished but I really liked....
I think some achievement when well done extend the replayability of a game.... and yet if you don't like it you don't have to do it.... I think they are a great addition to the games in general...
