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 100 tablets
Get hero to level 50
Build 200 tesla towers
Kill cancer
Build 100 artillery towers
Build 600 towers
Kill 40 duna worm pro
Destroy the bridge
Call 100 waves early
10 buying in the store
Use 75 bonus adrenaline
Use 150 bonus electroshock
Build 200 towers
Use 150 bonus bomb
Kill boss
Kill 4.000 enemies
Kill 2.000 enemies
Kill 1.000 enemies
Win one level