I just watched The Thing and it made me want to play through the game again (original Xbox). It's a fantastic survival horror game which is still really fun. Just like the movie, trust between everyone in game is a big factor. If you don't give your teammates
ammo or submit to blood tests you lose them one way or another. It was pretty innovative at the time. You had to make sure they were happy so they didn't go crazy. It's on the BC list so everyone give it a try!
Ninja Gaiden, both NGB and NG2 have some seriously smart AI which will change on the fly to adapt to how you approach each fight forcing you to mix up your attacks, spam the same old move and it'll nail you, hard!
I only play survival nowadays and while their movesets are the same the way they counter and flank constantly changes, damn AI still manages to surprise me and kill me in new ways.