Larian Studios Forums Divinity - Original Sin Divinity Original Sin - Help/Tips/Tricks 4 ppl puzzle only? *possible spoiler*

Not sure, but check the lights on sentinels when you put barrels on the plate, if light go off then you can do it without 4 chars... first plate is on the right side, it shutdowns first sentinel on the left side, you should push them all without beeing seen, if they see you once you should restart all over again