Re: What are you playing right now?
System Shock 2 is good; very tense.
I've just completed the first level (Med/Sci) and it is very similar to Bioshock, as you'd expect. Someone on the radio ordering you around, various technical malfunctions resulting in you having to fix airlocks and bulkheads etc so that you can progress. Very little ammo and resources and an RPG type of levelling - Engineer, Soldier or Psi being the three classes.
The psychic monkeys are right little bastards.