Here is the full list of all 34 Insanity's Blade achievements.
Play co-op on the day of love
Play singleplayer on the day of love
Finish Stage 0 in Hell Mode
Use a continue on Stage 0
Play within punching distance!
Wow! 100% on all your saves!
You beat the game!
Reach the max level!
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
Get the Cock Puncher
Go corpse surfing
Die in the water
Set a hostage free
Deliver a punishing ball kick!
Throw 'em around!
Skip the How To Play Video
The taste of true defeat
Now you can throw daggers!
Rip an arm off 'em!
Tear 'em in two!
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
Complete the Arcade adventure!