Here is the full list of all 30 Gravityball achievements.
Win any game
Win 10 games vs. Advanced or better Bots
Score 100 goals in any game format
Score 1000 total points in any game format
Earn 200 total rips in any game format
Earn 20 total assists in Doubles games
Earn 50 shutdowns in any game format
Win any tournament
Win each type of tournament against Pro bots or better
Win a Pro Bot tournament while representing each planet
Win a tournament of at least 20 teams vs. Master Bots
Score 5000 total points in any game format
Reach Single Player Rank 20
Reach Single Player Rank 10
Win 50-0 five times in Entangled Scoring vs. Pro Bots
Win a 4-player game vs. Master Bots
Win 5 tournaments of 10+ Teams vs. Master Bots
Win vs. Pro Bots in each Format on Squared Circle
Win vs. Pro Bots in each Format on Ring Game
Score 10 Supergoals (shots bounced in off a wall)
Earn your PGRA Tour Card in Career Mode
Qualify to compete on the Premiere Tour in Career Mode
Win the Lunar Doubles Knockout in Career Mode
Win the Singles Championship in Career Mode
Win the Doubles Championship in Career Mode
Win the Premiere Tour Championship in Career Mode
Win the Sol Cup in Career Mode
Win 50 games in Career Mode
Win all the First Place Trophies in Career Mode