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