Endoparasitic is a tactical survival horror game set in a secret research lab on a remote asteroid. After losing three limbs and becoming infected with a deadly parasite, your mission is to save your research. You must drag yourself through the lab's corridors, fend off horribly mutated monsters, inject numerous syringes of vaccines, and survive at all costs. The game requires you to manually perform every action, from reloading to moving, using only the mouse. You'll need to balance movement and firing while planning your approach to each room to avoid being overwhelmed.