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