Here is the full list of all 20 Defend Your Life achievements. It takes around 15-20 hours to unlock all of the achievements on Windows.
Win level in the brain
Get hero to level 50
Kill cancer
Get 100 tablets
Kill 40 duna worm pro
Destroy the bridge
10 buying in the store
Build 200 tesla towers
Build 100 artillery towers
Use 75 bonus adrenaline
Build 600 towers
Use 150 bonus electroshock
Use 150 bonus bomb
Build 200 towers
Kill 4.000 enemies
Kill boss
Kill 2.000 enemies
Call 100 waves early
Kill 1.000 enemies
Win one level