As a being of unknown origin, you slip out of a testing tube in a laboratory deep underground and have only one goal: survival. Sneak up on your tormentors and devour them to spread feat and terror in the facility where they imprisoned you. Crow and evolve as you destroy your prison piece by piece and develop increasingly deadly skills as you seek your revenge. But be careful. The military will get involved and try to do everything in its way to stop you - including flamethrowers, drones, and mechs. Solve puzzles to overcome traps and obstacles. Large holes in the wall offer an ideal opportunity to spread out and gain mass. The way through the different areas of the plant requires skill and intelligence. You will not only need to flip switches and rip out grids by force, but also use your creature's abilities correctly to survive.
The creature goes through a total of three evolutionary stages, which make it bigger and give it new powers. Certain abilities, however, are only available at certain sizes. Deposit biomass regularly at predetermined places and make yourself smaller to get past heavy guns or laser barriers that control armoured doors. Grow in size and use your full strength to tear away heavy metal objects and to survive a fight against flying guns.