Achivements can move up to 40,000 copies of a game.

[twesterm]

bonkers555 said:

thekitchensink said:
Well, I know that, all other things being equal, I tend to choose the 360 version because I prefer Achievements to Trophies. Like with Arkham Asylum, if the PS3 didn't have the extra content, I'd have got it on the 360.

The only reason I got Batman Arkham Asylum for the PS3 because of the Joker DLC.  99% of time I buy multiplat games for my 360 instead of my PS3.  I do prefer Achievements to trophies too.  I guess it just preference.

I'm actually the exact same way.  When looking at a multiplatform game, I usually choose in this order:

• Achievements-- if it's easy to get achievements, I'll probably get it for the 360, otherwise, not a big deal either way since all PS3 games now have trophies (before that, it was automatically 360).
• Online-- If I'm going to be doing something online, I'll choose 360 over PS3 since I have way more friends on Live.
• Random DLC-- If one game has a really cool DLC the other doesn't have (like Batman AA), I'll get that one.