Here is the full list of all 22 The Happy Little Virus achievements.
Get resurrected a lot
Get resurrected
Killed 20 holy antiviruses
Complete Mission: Cancer Research Nights
Drained 6 healing resistors
Found new weapon
Killed 100 laser antiviruses
Drained 6 charging resistors
Trap 300 things in bubbles
Fight the bull flawlessly
Killed 100 spiky antiviruses
Trap 100 things in bubbles
Killed 100 antivirus drones
Spend no time designing a virus
Won game with a betrayal
Won game with the destruction of organised religion
Design 10 Viruses
Beat 10 levels without being hit