Here is the full list of all 34 Insanity's Blade achievements.
Wow! 100% on all your saves!
Reach the max level!
You beat the game!
Get hugged by a crawler
Collect all the questy things!
Bought the 6-way magic daggers!
Thurstan gets possessed
Get all the pointy things!
Pay your dues to the zombie priests
Play within punching distance!
Get the Cock Puncher
The taste of true defeat
Use a continue on Stage 0
Die in the water
Deliver a punishing ball kick!
Go corpse surfing
Set a hostage free
Tear 'em in two!
Now you can throw daggers!
Rip an arm off 'em!
Throw 'em around!
Skip the How To Play Video
Revisit 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!
Hey! We thought you liked it rough!
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
Complete the Arcade adventure!
Finish Stage 0 in Hell Mode