I passed the "big cold room" puzzle, went trough the corrider, but then there's a small tower surrounded by hazardous liquid (water?), anyway what do I do now?
There's also a huge room with 4 canons, but once i destroyed them all, what? There's a locked door thats it.... THX!
Go back to the room with electrified water. Go on the top ledge and work your way around near the window where you killed the officer/troopers. There's a button in there...shoot it. You can do the rest ;)
woah... quick and effective... thx pal !