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