Picked this up last night.
So far it's been pretty freakin spooky, and I haven't even gotten that far.
It's a 3rd person shooter and looks to be well done. The environment is very nice and some nasty surprises, like just after entering a "safe" looking room the lights fail and then the "your about to die" music starts. Different weapons than your standard shooter, most seem to be mining "tools". Just shooting the bad guys just doesn't work with them, you have to get messy...
Then there is the gravity boots, that takes some getting use to, not to mention working in a vacume.
There is also some downloadables on PSN, two suits, one free and the other a couple of bucks.