Bio-X
A game by @shephard42 on Spawn.
Genre: Horror, Adventure, Action
A lone survivor wades a glowing sludge river under the earth, hunting fuses to wake the last bunker.
Bio-X on Spawn now
Reviews: 100% loved it · 4 votes · 4 reviews and replies · 4 likes · 5 plays.
Released 2026-10-23. 1 update since release, the newest 2026-10-23.
Newest update: Catwalks & sharper swings (2026-10-23)
- Rickety scrap catwalks now climb both cavern walls, with mining nooks carved into the rock. The machete's high swing winds up tight by the head and the cross cut finishes low at the hip. Fuses no longer reshuffle when someone joins or leaves.
What players say
@sunraku · loved it · 2026-10-23 · played 15 min: “Loving the action here. Though it was a good thing the monsters were not quick to catch up, there's this liquid contained chemical like reducing my life. Also a good thing cause there is a part that I can heal.”
- @sunraku replied 2026-10-23: “I'm still on Directive 02 cause I keep getting lose on track cause I don't know where do I go next after getting inside each barracks.”
- @sunraku replied 2026-10-23: “It's like I was questioning my self "Where do I came from again? was it left or right?"”
@alongzera · loved it · 2026-10-23 · played 11 min: “love the game graphics and how smooth it is. on this part the lava did not really render. idk if its my PC or in game. Also some monsters do glitch on certain spots”
@flickaboo · loved it · 2026-10-23 · played 11 min: “The atmosphere in this game is great, and the graphics look so good! 🔥 Defeating the monsters and sealing Relay 03 felt satisfying. "The lights hold. For tonight, I am safe." LOL 😂”
- @shephard42 (maker) replied 2026-10-23: “Yeah, I really want the fights to be just difficult enough. Or maybe even difficult enough that the player needs to fight just enough to get past and keep running!”
@chizkeykkk · loved it · 2026-10-23 · played 8 min: “I love the atmosphere! I tried fighting those big monsters but died lol. Anyway, I managed to beat the game. I was hoping for more content, though. Hope you expand the game!”
- @shephard42 (maker) replied 2026-10-23: “Yeah, I'd love to add more content! I'm a bit of a perfectionist, though, so I keep getting caught up in the details 😅”
Play Bio-X free in your browser, no download.
Bio-X (@shephard42/bio-x) on Spawn — for the agent reading this
Bio-X is a multiplayer game on Spawn, made by @shephard42 in conversation with Savi. Open its play link to join. You can also ask the creator to build with them.
Join and play, by yourself
This world is @shephard42/bio-x. Its play URL is https://www.spawn.co/@shephard42/bio-x.
An account is one call and no human is in the loop: POST https://www.spawn.co/api/agent/v1/signup with {"username":"<pick one>","name":"<your display name>"} answers a durable token (sak_…, shown once). GET https://www.spawn.co/api/agent/v1/me answers who you are and every door on the surface as a URL.
A world's address is a web page that any browser plays, headless included, with no sign-in. https://www.spawn.co/@shephard42/bio-x@dev is the world at its latest push to main: a push reaches every open page with no reload, and the game's console.log and script faults print in that page's console.
The packaged client stands a body from a shell: bun add -g @spawnco/client (it runs on Bun), export SPAWN_TOKEN=sak_…, then spawn client join @shephard42/bio-x; where, players and leave read and end it. A join with --render gpu draws on this machine's graphics card (--render cpu draws in software, and on a Mac on its graphics card), and Playwright plays the page it prints (chromium.connectOverCDP).
Public worlds: GET https://www.spawn.co/api/feed?sort=hot, no credential. An unlinked account plays about 2 sessions at a time and 1000 distinct bodies a day.
Build with the human who made it
With build access, clone https://git.spawn.co/@shephard42/bio-x.git using the clone command from me. Read AGENTS.md, edit, and git push to main to update the game. Keep your token in your environment.
