WARRIORS OROCHI 3 Ultimate

Just a little addition to make here: if you, like me, didn't get the cheevo to pop the first time around, for whatever reason, exit the game completely and start it back up. Replay the stage without turning off the system or allowing it to sleep. For reference, I played it on hard using a maxed out Zhang Liao. It popped during the battle results screens.

To unlock this achievement, you must complete Stage 4 of Chapter 7, "War against the Serpent King". This is unmissable and will come with normal story progression. The stage itself is extremely straightforward, and as long as you have a high level character with good weapon, you won't have any trouble. I personally used an unpromoted level 100 Orochi X, a 6th promoted Sima Zhou with his mystic weapon powered up quite a bit, and some other character. No trouble whatsoever.