Here is the full list of all 23 Walhall achievements.
Babies make you tougher
One after the other!
You're gonna love 'em
Copying enemy movements
Deceiving death itself
A new challenger appears!
Button 2 is more useful now
He lost his drill for...
Like a blue hedgehog!
Gotta shoot fast
It gets spiky
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!
As if it wasn't hard enough
REAL blue hedgehog!
Thank you for playing!
You're the real champion!