Here is the full list of all 47 Splasher achievements.
Go Splashteam
Why is it always me?
You rang milord?
Jump and you're history
699
You're never going to keep me down!
Two Splashers in the same place? Impossible.
Complete a level without jumping
Rescue all 154 Splashers in Standard mode
Complete the game in Standard mode
Give yourself to the Dark Side
Complete all the quarantine areas
A close shave
Mashed Potatroopers
A good Potatrooper is a drowned Potatrooper!
Get Bouncink
A bird with two stones
At least I'm not the only one
Lasers are my calling card
You should have held that door!
Off to a flying start
All in a good cause
I get knocked out, but I get up again!
It's all going splendidly
A good Potatrooper is a dead Potatrooper!
Fries anyone?
Get Water Stickink
A friend in need is a friend indeed
Rescue all the Splashers from a level in Standard mode
Complete a level without dying
Get Water
Right time, right place
Get your first Medal in Time Attack
Get your first Gold Medal in Time Attack
Get your first Platinum Medal in Time Attack
Complete a Selfish Speedrun
Complete a Standard Speedrun
Complete a Gotta Catch'em All Speedrun
Get your first Medal in Speedrun
Get your first Gold Medal in Speedrun
Get your first Platinum Medal in Speedrun
Complete a Speedrun without dying a single time
Get all the Bronze Medals in the game
Get all the Silver Medals in the game
Get all the Gold Medals in the game
Get all the Platinum Medals in the game
Get all the Achievements. After that, you are definitely one of the best players on the planet, perhaps even the best ever! Continue to prove it in the leaderboards!