Use your suit's oxygen in an ill-advised manner.

Finish the main story in New Game+ mode

Acquired all trophies.

Won a Group Match.

Won a Ranked Match.

Complete the Trial by Water.

Strike three or more enemies with Tidal attacks while using unlimited ammunition following a Quick Refill.

Channel the heavens.

Defeat Leviathan in "Final Fantasy" mode.

Awaken the storm.

Enter Mysidia.

Defeated Harada_TEKKEN in Super Ghost Battle.

Finished Arcade Quest.