Unlock Plague Types
Hidden Plague - Beat ALL 8 Plague types on Brutal Difficulty.
Immune Plague - Beat ALL 8 Plague types on Brutal Difficulty.
Unlimited Plague - Beat ALL 8 Plague types on Brutal Difficulty.
Bio-Weapon - Beat Nano-Virus Plague type on Normal or Brutal Difficulty, OR pay US$0.99 after unlocking Nano-Virus.
Fungus - Beat Virus Plague type on Normal or Brutal Difficulty, OR pay US$0.99 after unlocking Virus.
Nano-Virus - Beat Prion Plague type on Normal or Brutal Difficulty, OR pay US$0.99 after unlocking Prion.
Neurax Worm - Beat all 7 plague types on Brutal Difficulty only, OR pay US$1.99.
Parasite - Beat Fungus Plague type on Normal or Brutal Difficulty, OR pay US$0.99 after unlocking Fungus.
Prion - Beat Parasite Plague type on Normal or Brutal Difficulty, OR pay US$0.99 after unlocking Parasite.
Virus - Beat Bacteria Plague type on Normal or Brutal Difficulty, OR pay US$0.99.
Unlimited DNA When Playing Nano-Virus
This simple exploit of current game mechanics makes a joke of one of the harder disease types! (When playing nano-virus, they are aware of and curing your virus from the start) It requires only that you have unlocked (and equip) the 'Sympto-Stasis' genetic code upgrade when setting up your game. Genetic codes are unlocked by winning a game on any difficulty with any virus type. With Sympto-stasis equipped, the cost of symptoms does not increase as you evolve them. The nano-virus has 2 symptoms that actually -GIVE- DNA when you take them, and this virus type has a natural ability where devolving costs don't rise (default cost of devolving gives 2 DNA). These are Insomnia and Paranoia. Simply buy those 2 and then repeatedly devolve/evolve paranoia for unlimited, free DNA.
Unlock Cheat Modes
Beat all the gamemodes, Bacteria to Bioweapon all on Brutal.
Unlock New Game Types
Bio-Weapon - Beat Nano-Virus on Normal or Brutal.
Fungus - Beat Virus on Normal or Brutal.
Nano-Virus - Beat Prion on Normal or Brutal.
Parasite - Beat Fungus on Normal or Brutal.
Prion - Beat Parasite on Normal or Brutal.
Virus - Beat Bacteria on Normal or Brutal.
Necroa Virus - Beat all previous plagues and Neurax worm on brutal difficulty.