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