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