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