Crysis senior game designer Bernd Diemer has said that co-operative multiplay and zero gravity modes will have to be added to the game by the modding community.
Crytek would loved to have added the content itself, he told Eurogamer.de in an interview, but it just didn't have time.
Instead, it seems as though its been improving the AI again. Apparently the game's so complex now that some enemy-brain fine-tuning was in order. Presumably so that you don't catch any of the nasties off-guard, randomly walking into a wall or talking to a tree.
And don't expect the aliens to be skinny little push-overs with the thinking power of a footballer, because they're as smart as the soldiers this time around (gosh), and will attack and manoeuvre in groups.
Diemer also wanted to say just how angry he was at the leaked footage from an old version of the game. It's not representative of where Crytek is with the game right now, apparently, so just you watch your step.