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