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