Endoparasitic by miziziziz

Three limbs ripped off, infected with a deadly parasite, you must save your research. Drag yourself through the corridors of a secret research lab on a remote asteroid, fight off horribly mutated monsters, inject countless syringes of vaccines, and survive at all costs.
Endoparasitic is a tactical survival horror game where you must manually do every action from reloading to moving. Juggle movement and firing and plan room entrances to avoid getting swarmed.
Features:

• One handed in game, one handed in real life: Everything is mouse-controlled
• Guns are manually loaded one bullet at a time
• Your healthbar is a parasite burrowing to your brain
• Stealth sections
• Puzzles
• Story and characters
• Various mutated monsters to fight
• Boss fights
• Four guns

Get the OST: https://queenjazz.bandcamp.com/album/endoparasitic-ost
Check out the original jam version made in two days: https://nartier.itch.io/endoparasitic-jam-version