So our next question is, given the minimum temperatures possible on this planet, what kind of atmospheric pressure are we looking at such that we can still have liquid water?

Just thought I should point out a potential "reason" or answer to this from the game's programming point of view. (In general game programming, not this one specifically.)

But, it is likely that the farther an entity is from the player, this slower it "ticks" or "thinks". This would obviously be ...