Complete chapter 5
Complete the game with no life upgrade
Be awarded with an extra chain reaction in chapter 4 or 5
Reach the last wave difficulty in all challenges
Complete the game with both difficulties set to hard
Earn all gold medals in story mode
Earn all diamond medals in story mode
Complete sample 8 without destroying a single bloated cell
Complete sample 12 without touching a single sticky web
Complete sample 14 without slowing the chain
Complete sample 17 without being poisoned once by toxins
Complete sample 21 without colliding with a single flagellate pathogen
