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