The v3.1 Title update for Sentinels of the Multiverse has 16 achievements.
Defeat all Season 1 & 2 classic Villains.
Defeat all Season 1 & 2 classic Villains on Advanced.
Defeat all Season 1 & 2 classic Villains on Challenge Mode.
Defeat all Season 1 & 2 classic Villains on Ultimate Mode.
Defeat all Season 2 team Villains.
Defeat all Season 2 team Villains on Advanced.
Defeat all Season 2 team Villains on Challenge Mode.
Defeat all Season 2 team Villains on Ultimate Mode.
Win a battle in each Season 1 & 2 Environment.
Defeat OblivAeon.
Defeat OblivAeon on Advanced (including all Scions on Advanced).
Defeat OblivAeon on Challenge Mode.
Defeat OblivAeon on Ultimate Mode (including all Scions on Advanced).
Defeat OblivAeon starting with each of the 5 OblivAeon Shields.
Earn all of the OblivAeon Mission Rewards in a single game.