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