Here is the full list of all 34 Insanity's Blade achievements.
Complete the Arcade adventure!
Get hugged by a crawler
Hey! We thought you liked it rough!
Finish Stage 0 in Hell Mode
Pay your dues to the zombie priests
Use a continue on Stage 0
Revisit the How To Play video
Beat the game on Casual difficulty
Wow! 100% on all your saves!
Play within punching distance!
Get all the pointy things!
Reach the max level!
You beat the game!
Collect all the questy things!
Bought the 6-way magic daggers!
Thurstan gets possessed
Beat a walking level without crouching.
Get the Cock Puncher
The taste of true defeat
Die in the water
Go corpse surfing
Set a hostage free
Tear 'em in two!
Now you can throw daggers!
Rip an arm off 'em!
Throw 'em around!
Deliver a punishing ball kick!
Skip the How To Play Video
You are an ARCADE MASTER!
Upgrade Finn's axes to max level!
You like to live dangerously, no saves!
Go through HELL with no saves!
Play singleplayer on the day of love
Play co-op on the day of love