Here is the full list of all 20 Not Dying Today achievements.
Clear Mission 0
Kill Boss Butcher
Kill Boss Nurse
Transform into Zombie
Kill Boss Dr.Brain
Kill Boss Tanker
Kill Boss Warden
Kill Boss Spider
Defeat Z-Load
Enhance a melee weapon to max grade
Enhance a remote weapon to max grade
Collect 100000 gold in the game
Unlock All Melee Weapons
Unlock All Gun Weapons
Use one grenade to kill more than 10 zombies
Burn 100 zombies to the ground
Complete Game In Easy Mode
Complete Game In Normal Mode
Complete Game In Hard Mode
Complete Game In Hell Mode