Here is the full list of all 23 Freedom Fall achievements.
Beat the princess in a race section.
Complete the guilty path in level 11.
Get the dragon ending.
Complete the game.
Complete the not-guilty path in level 11.
Complete Chainmoor
Escape the shark boss.
Kill yourself with a bomb.
Complete Bombard
Buy all the equippable items in the shop.
Collect 50 large gears.
Enter a no-boys-allowed zone.
Get the solo ending.
Get the princess ending.
Pass a level without dying.
Pass the game without dying.
Kill the shark boss.
Get cog, time and death par for all levels
Get under time par for every level
Get under the death par for every level
Get over cog par for every level
Complete game without buying any equipment
Complete the game on Hard mode