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