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