Grimrock

I quite like achievements in the sense that they are meant to be directed challenges for if you want more out of the game.

I never really go for any the first time I play, If I get the urge to play again i'll look and see if there's any I'm interested in.

Personally I'd really like having audio sliders for when I'm playing while also talking on vent etc.
Having to adjust everyone's volume up and my volume down isn't impossible or anything but it is a lot more awkward then adjusting in game volume.