Here is the full list of all 23 Space Farmers achievements. It takes around 6-8 hours to unlock all of the achievements on Windows.
Escaped The Extreme Grinder
Unlocked Franky in Attack Of The Vegtabots
Found the funny face mask.
Did all the challenges in 1 run
Complete all the challenges
Got to the end of the game with no deaths.
Carried the pig 1000 metres
Made it through 'Pig Weapon' with one set of gloves.
Found the final piggy.
Killed 500 chompys
Made it through the discotheque.
Made it through Bomb Hats without collecting all the clocks.
Didn't let the Pieosaurus die.
Got killed by a mine when not wearing the goggles in Helpful Chums
Killed 3 chompys at once with potato bombs
Killed all the soldier bots in Cross Fire
Spent some turnips.
Killed 100 chompys
Killed more chompys than your friend in a game.
Made it to the end of game party
Made it through The Grind without getting the weapons.
Escaped The Grinder
Played as another character.