Normal, No DLC

Normal Mode

No Limit

Original, No Restrictions

Casual, Bacteria

Casual, Fungus

Casual, Neurax Worm

Casual, Prion

Casual, Nano-Virus

Casual, Shadow Plague

Casual, Nano-Virus

Brutal, Bio-Weapon

Casual, All Plagues

Casual, Parasite

Casual, Simian Flu

Casual, Necroa Virus

Casual, Bio-Weapon

Mega-Brutal, Prion

Casual, Virus

Casual, All Standard Plagues

Casual, Bacteria

Primrose, Switch, NMG

Ophilia, Switch, NMG

Master

Any Difficulty