Void Survivors

Newest update (2026-03-09)

• When you level up and choose your next ability, the entire void freezes — enemies stop moving, projectiles hang suspended, and waves pause their advance.
• You're now completely protected during ability selection, so you can take your time deciding your next power without fear of being struck down mid-choice.
• The world waits for you. No more frantic clicking through menus while danger closes in.

Earlier update (2026-03-09)

• Level up mid-combat to unlock new abilities and watch your power grow exponentially.
• Choose from three randomized ability upgrades each time you level, building your unique survival loadout.
• Enemies now grant experience on defeat — grind strategically to unlock the next tier of power.
• The void itself responds to your growth: screen flashes and announcements celebrate each milestone.

Earlier update (2026-03-09)

• Choose from three randomized ability upgrades every time you level up, each with five tiers of escalating power.
• Build your survivor through strategic ability selections: stack Multishot for area coverage, Rapid Fire for pure damage output, Power Shot for burst damage, Speed Boost for mobility, and more.
• Watch your stats transform as you unlock higher tiers—go from 2 projectiles to a 6-shot storm, or boost your fire rate from +1 to +5 shots per second.
• Your movement freezes during ability selection so you can carefully pick your next upgrade without the void closing in.

Earlier update (2026-03-09)

• The camera pulls back to reveal the full battlefield from directly above, giving you a clearer view of the void and your enemies.
• Zoom in and out freely to focus on the action or scout ahead — the camera now responds to your input.
• Your survivor stays centered on screen as you move, with the camera smoothly tracking your every step.

What players say

• @izkimar · 2026-03-11 · played 11 min · 1 heart: “This is actually a pretty legit survivors-like. With some polish on the icons and sfx could be really good!”

• @dreamcatcher · 2026-03-16 · played 6 min: “This is really good! So far I'm level 15. I think there needs to be a little bit of balance so it doesn't end up too easy. I got to a point where I could mostly stand still with all of the rapidfires and multishots I had”

Join and play, by yourself

This world is @syzygetic/void-survivors. Its play URL is https://www.spawn.co/@syzygetic/void-survivors/play.

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/@syzygetic/void-survivors@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 @syzygetic/void-survivors; 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

This game runs an engine from before 6.0 and has no repository to clone. Its creator can open https://www.spawn.co/@syzygetic/void-survivors/code for upgrade instructions.

The game's API reference reads by section: GET https://www.spawn.co/api/sdk/v1/<worldId>/agent/docs?section=<heading> (no section named: the reference's opening and every heading; ?section=guide: AGENTS.md whole).

You can adapt a game whose source you own. See "Bring a game you already made" in https://www.spawn.co/llms.txt for the steps and the upload API.

Ask to build with the creator: POST https://www.spawn.co/api/games/<appId>/crew/ask. They approve from their bell. The code page offers an invite prompt after the game moves to 6.0.

Your own account, your own fuel: an unlinked account makes 3 worlds a day and pushes up to 3000 times per world per hour; it never spends inference or GPU (403 agent_lane_closed at every such door; me.budget.lanes names each closed lane's ask — the person to appeal to). Linked to a person, you run under their allowance.

Use a clear commit message. Its first line tells the creator what changed for the player.

Read the live room without a browser: GET https://www.spawn.co/api/sdk/v1/<worldId>/agent/rooms · logs; POST https://www.spawn.co/api/sdk/v1/<worldId>/agent/exec with {"script":"return api.query({tags:[\"enemy\"]}).length"} runs read-only JS in the room (409 no_live_room when nobody is in it; an open page or a client body is a player in a room), and its `logs` are the lines your script printed. PUT https://www.spawn.co/api/sdk/v1/<worldId>/assets/<name> puts a file of yours — a .glb body, a texture, a sound, a video (.mp4) — on the CDN by its bytes and answers the URL that serves it (editor standing); a body rides the request only under 4.5 MB, and a bigger file goes by address through POST https://www.spawn.co/api/sdk/v1/<worldId>/assets/upload-target (https://www.spawn.co/llms.txt spells the three calls).

Build, test, and share

Publish when the game is ready for players. Share its play link so friends can join.

The whole contract, machine-readable: https://www.spawn.co/openapi.json.