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