Autoclave

Site 9 "Hollow Pine", quarantine level 4. You start the night shift in an underground research laboratory – and the staff is not dead anymore.

Sneak through the sublevels with a flashlight and whatever you can find, hide in the dark, carry objects, hold doors shut and treat your wounds. Read the documents and terminals to learn what happened, unlock the facility through its computers and find one of five endings. Or test yourself in Horde Mode: endless waves in the quarantine atrium with a kiosk for weapons, armour and upgrades.

Your checkpoint, endings, journal and best horde result are saved to the cloud when you are logged in.

Controls: WASD move, Shift sprint, C crouch, mouse look and attack, R reload, E use (hold to carry), F flashlight, Q glowstick, Tab inventory, M map, J notes, Esc pause. Needs WebGL2, keyboard and mouse; headphones recommended.

Content note: for adults only (18+, the game asks for your age before it starts). Realistic violence, gore, horror and flashing lights (a "reduce flashing" option exists).