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