Here is the full list of all 24 Spaceland achievements.
Create all abilities for one hero.
Kill one enemy with a geyser
Complete 28 levels per speed
Find 28 secrets
Kill 10 kick Enemies
Earn 100 chips
Destroy the professor
Complete 28 levels in normal difficulty
Speed up 3 allies
Kill 3 enemies with a roach ray
Assemble 7 heroes team
Kill 10 enemies with a mine
Destroy the shaman
Kill 8 enemies with a pistol
Explosion 10 walls
Freeze a grenade 10 enemies
Heal 300 health engineer
Destroy the military bot
Put on 3 items of equipment on the hero
Explosion 5 holes
Locate private Carmine
Repair equipment
Kill Monster