| Achievement | How to unlock
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|---|
| Ace - Racketball | Score without letting your opponent touch the ball in racketball
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| Ace - Soccer | Score without letting your opponent touch the ball in soccer
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| Ace - Volleyball | Score without letting your opponent touch the ball in volleyball
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| Backstreet Slimes | Unknown
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| Comeback - Racketball | Come back from a near loss in racketball
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| Comeback - Soccer | Come back from a near loss in soccer
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| Comeback - Volleyball | Come back from a near loss in volleyball
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| Dark Side of the Moon | Unknown
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| Easy Mode | Win a tournament on the easiest difficulty
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| Elemental | Unknown
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| Encounter Champion | Trigger and win your first encounter
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| Encounter Champion 2 | Trigger and win 3 encounters
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| Encounter Champion 3 | Trigger and win 6 encounters
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| Encounter Champion 4 | Trigger and win 10 encounters
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| Encounter Champion 5 | Trigger and win 15 encounters |
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| Explorer 1 | Unlock Pensive Pines
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| Explorer 2 | Unlock Hailstone Hill
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| Explorer 3 | Unlock Sunny Sewers
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| Explorer 4 | Unlock Ghostly Graveyard
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| Explorer 5 | Unlock Veiled Void
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| Flawless | Win a match 5-0 in Tournament Mode
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| Flawless 2 | Win 3 matches 5-0 in Tournament Mode
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| Flawless 3 | Win 6 matches 5-0 in Tournament Mode
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| Flawless 4 | Win 10 matches 5-0 in Tournament Mode
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| Flawless 5 | Win 15 matches 5-0 in Tournament Mode
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| Flawless 6 | Win 21 matches 5-0 in Tournament Mode
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| Flawless 7 | Win 28 matches 5-0 in Tournament Mode
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| Goo Mode | Win a tournament on maximum difficulty
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| Grrawrr! | Unknown
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| Hard Mode | Win a tournament on hard difficulty
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| Match Winner | Win your first match in tournament mode
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| Match Winner 2 | Win 5 matches in tournament mode
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| Match Winner 3 | Win 20 matches in tournament mode
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| Match Winner 4 | Win 50 matches in tournament mode
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| Match Winner 5 | Win 100 matches in tournament mode
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| Max Swag | Max out a costume for one of your slimes
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| Max Swag 2 | Max out 4 costumes for your slimes
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| Max Swag 3 | Max out 10 costumes for your slimes
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| Max Swag 4 | Max out 20 costumes for your slimes
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| Max Swag 5 | Max out all 31 costumes for your slimes
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| Nerd | Unknown
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| No Hands Racketball | Score without touching the ball in racketball
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| No Hands Soccer | Score without touching the ball in soccer
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| No Hands Volleyball | Score without touching the ball in volleyball
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| Non-stop | Unknown
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| Normal Mode | Win a tournament on medium difficulty
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| Overstimulated | Unknown
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| Powered Up | Unlock your first slime
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| Powered Up 2 | Unlock 3 slimes
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| Powered Up 3 | Unlock 6 slimes
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| Powered Up 4 | Unlock 12 slimes
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| Powered Up 5 | Unlock 20 slimes
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| Prison Break | Unknown
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| Racketball Champion 2 | Win racketball tournaments with 2 different slimes
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| Racketball Champion 3 | Win racketball tournaments with 4 different slimes
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| Racketball Champion 4 | Win racketball tournaments with 8 different slimes
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| Racketball Champion 5 | Win racketball tournaments with 16 different slimes
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| Racketball Champion 6 | Win racketball tournaments with all 32 different slimes
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| Ready for Anything x 13 | Win 13 consecutive matches in quick game
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| Ready for Anything x 2 | Win 2 consecutive matches in quick game
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| Ready for Anything x 4 | Win 4 consecutive matches in quick game
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| Ready for Anything x 6 | Win 6 consecutive matches in quick game
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| Ready for Anything x 9 | Win 9 consecutive matches in quick game
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| Soccer Champion 2 | Win soccer tournaments with 2 different slimes
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| Soccer Champion 3 | Win soccer tournaments with 4 different slimes
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| Soccer Champion 4 | Win soccer tournaments with 8 different slimes
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| Soccer Champion 5 | Win soccer tournaments with 16 different slimes
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| Soccer Champion 6 | Win soccer tournaments with all 32 different slimes
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| Swag | Purchase a costume for a slime
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| Swag 2 | Purchase 5 costumes for your slimes
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| Swag 3 | Purchase 20 costumes for your slimes
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| Swag 4 | Purchase 50 costumes for your slimes
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| Swag 5 | Purchase all 93 costumes for your slimes
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| Tenure | Win gold with every slime in every sport
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| The Big One | Unknown
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| The Neverending Game | Unknown
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| Tournament Champion | Win gold in your first tournament
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| Tournament Champion 2 | Win gold in 5 tournaments
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| Tournament Champion 3 | Win gold in 15 tournaments
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| Tournament Champion 4 | Win gold in 25 tournaments
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| Tournament Champion 5 | Win gold in 40 tournaments
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| Tournament Champion 6 | Win gold in 60 tournaments
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| Unstoppable | Unknown
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| Volleyball Champion 2 | Win volleyball tournaments with 2 different slimes
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| Volleyball Champion 3 | Win volleyball tournaments with 4 different slimes
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| Volleyball Champion 4 | Win volleyball tournaments with 8 different slimes
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| Volleyball Champion 5 | Win volleyball tournaments with 16 different slimes
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| Volleyball Champion 6 | Win volleyball tournaments with 32 different slimes
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| Where did the king keep his armies? | Unknown
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