RWBY: Grimm Eclipse

This is the last boss of the game, it's a green scorpion type thing. All you have to do is be playing as Blake, and hit "Down" on the D-Pad immediately after the beast dies.

Figure'd i'd add a minor walkthrough to the fight.

This is somewhat difficult, but if you're patient and run circles and make sure your Aura stays up you should be fine. It will attack a couple times and when you're in mid range on it's 3rd attack it'll thrust it's stinger and get it stuck in the ground, hitting it's stinger is the only way to damage it (while it's pinned in the ground). Run in, and hit it with a fully charged Y Attack or use your Ultimate if it's available.

1/4 of the way down in health, it'll spawn 4 enemies and a gunner, the gunners respawn infinitely. Kill those and stun or just avoid the gunner (as Ruby your triple shot with the gun if you have chain lightning will stun him) and then continue as you have. It'll change up some tactics as to how it attacks etc. But for the most part remains the same. The floor will begin to alternate spikes, watch your footing.

1/2 it'll do the same and spawn 4 infected and a robot with a staff. The robot spawns infinitely and is dangerous, again, stun if you can and avoid after killing the little guys, the gunner from before can die now. The creature seems to attack more and dig more and youll have to line up with him before his stinger will hit the ground.

3/4 of the way in, he'll spawn enemies again, kill them, but the downside is now you have a gunner and a staff robot spawning infinitely, and the boss tends to spam his rain attacks twice before changing attacks. Keep at it and you're golden.

Here is my guide to help you get this achievement!