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