Just finished the Prey single player campaign. Yeah, it was kind of short. But it was AWESOME. The closest I've ever seen to some of these gravity puzzles is the topsy-turvy dungeon in Majora's Mask, but they can't shake a stick at Prey. Not even a little stick. They also flat out said 'we are making a sequel', and I'll probably have to pick that one up. It would be a lot longer if you could actually die...
There aren't that many bosses, but all but one is beaten by solving a puzzle, not just by fighting. That's my favorite kind of boss. I won't spoil it for anyone.
I can't recommend buying the thing for just a six-hour SP game (especially since the multi-play is laggy as F and only comes with DM and team DM) but the 360 version is good for a rental. Only get it for the PC if you don't have a 360 to play the rental on, or you plan on mapping for it - Those gravity effects are going to make for some awesome maps once the mod community gets at it.
There aren't that many bosses, but all but one is beaten by solving a puzzle, not just by fighting. That's my favorite kind of boss. I won't spoil it for anyone.
I can't recommend buying the thing for just a six-hour SP game (especially since the multi-play is laggy as F and only comes with DM and team DM) but the 360 version is good for a rental. Only get it for the PC if you don't have a 360 to play the rental on, or you plan on mapping for it - Those gravity effects are going to make for some awesome maps once the mod community gets at it.