I never really pay much attention to them, but I can see how some people might like to be able to show that they got all the acievements for a game, or got the acheivemenbt for completing on the hardest difficulty, or collecting all 100 packages etc.
what I don;t understand is why games have achievements for something that requires no effort whatsoever.
Case in point, Napoleon total war. there is a Steam achievement for starting any battle or campaign single or multiplayer. Literally everybody who has the game and has gone further than the title screen once will have this achievement. So what is the point?
I have noticed this trend in plenty of other games too - acheievements for doing basically nothing e.g. completing the training map or the fist level on easy. big freakin deal.
Is it just padding so the seller can say "N:TW, with 250 achievements to get!'