Here is the full list of all 42 Scrap Garden achievements. It takes around 3-4 hours to unlock all of the achievements on Windows.
Defeat the worm
Find the alarm clock
Collect 300 crystals
Eliminate 10 enemies
Break 10 boxes
Visit a friend
Break 5 policemen
Collect 100 crystals
Complete the arcade minigame
Get back the generator
Start playing
Collect 500 crystals
Collect 1000 crystals
Collect 1500 crystals
Eliminate 50 enemies
Eliminate 100 enemies
Eliminate 300 enemies
Break 50 boxes
Break 100 boxes
Go down the hill
Get to the end of rails
Find the green crystal
Find all holograms
Throw a ball into the basket
Die in the shadows
Let the worm toss you up in the air
Defeat the gorilla
Take a punch from the gorilla
Defeat the octopus
Get bitten by piranhas
Defeat the toad
Get eaten by the toad
Defeat the dragon
Get burned by the dragon
Find the camera
Find the Rubik's cube
Find the mp3 player
Find the pumpkin
Find the snow globe
Find the card
Complete the game
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