Here is the full list of all 23 Walhall achievements.
It gets spiky
Deceiving death itself
Like a blue hedgehog!
Button 2 is more useful now
He also wants to hit
One after the other!
Gotta shoot fast
Babies make you tougher
You're gonna love 'em
Copying enemy movements
A new challenger appears!
He lost his drill for...
You're feeling tough
Helps hitting your target
At last you can watch it
Speed up!
Your actions are under control
Take me seriously!
I'm gonna catch you!
As if it wasn't hard enough
REAL blue hedgehog!
Thank you for playing!
You're the real champion!