The AquaDome Title update for Rocket League has 7 achievements.
Equip the Bubbles Rocket Trail and Score an Aerial goal, while playing in AquaDome
Freeze an opponent's shot before it can score
Make 535 Shots on Goal
Win the MVP award in a game that goes to overtime
Score a Goal, Save a shot, and Assist a teammate in a single game
Activate every power-up in Rocket League Rumble
Head to AquaDome and score a goal while flipped on your back