In Biocage 2, you have to evoluate your green virus to be able to fight against the ennemies (red and blue viruses). In this shooter game, evolution is very important. Between each level, you choose which direction you want to give to your evolution.
On Biocage 2, you control the virus with your keyboard and you aim and fire with the mouse.
16 enemies, 16 rewards (with perks), 8 upgrades for your virus.