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