Here is the full list of all 17 Supraland Demo achievements. It takes around 1-2 hours to unlock all of the achievements on Windows.
Drive the plot forward
Found holy sword upgrade
Not even once? Nothing is being cooked.
Found Armor
Found Telefrag Upgrade
Reached top of the hill
Bought Triple Jump Upgrade
Bought Double Jump Upgrade
Found a healthbar
Got Health Regeneration Upgrade
Bought a Force Cube
Perfect 5/7 experience
The first secret area in the game
Nom nom
Unlocked Speed x2
Find out what they are up to
Made your first step