Marrowgate

A game by @izkimar on Spawn.

Genre: Roguelite, Action, RPG

You're a wizard descending into three corrupted wounds—the Frozen Hour, the Ashen Vale, the Strangling Garden—to mend the spell that broke the world. Cast, loot, and push deeper with your party.

Marrowgate on Spawn now

5 reviews and replies · 6 likes · 101 plays.

Released 2026-09-03. 1 update since release, the newest 2026-09-03.

Newest update: Solo Vigil (2026-09-03)
  • Marrowgate walks alone for now. The world runs single-player until the co-op fix lands: no second wizard, no downed state, no lifts — a fallen wizard dies and returns as before. Party scaling, shared xp and the boss's co-op tricks rest until then. Bag icons: every staff, robe, mantle, glove and circlet now shows its glyph. Quest arrows point at the door when the goal is in another zone. Melee packs hold their leash instead of seesawing.
What players say

  • @jeon · 2026-09-03 · played 13 min · 1 heart: “The game feels like an MMORPG lol. I like the fact that the character can dash in and dash out, its good for starters to kill mobs and level up. I think it would be nice to add a map to make it easier to navigate around the town or dungeon.”

    • @izkimar (maker) replied 2026-09-04: “thanks, glad you liked it! and yeah it does sort of have an MMO feel. thx for the feedback!”

  • @gfta · 2026-09-03 · played 6 min · 1 heart: “the passive skill list!!!! this lookin god buddy”

    • @izkimar (maker) replied 2026-09-04: “thx man lol”

  • @abbidabbi · 2026-09-03 · played 3 min · 1 heart: “Didint play a Lot But your talent system is glorious”

    • @izkimar (maker) replied 2026-09-04: “lol appreciate it, going to try and make it even better”

  • @sunraku · 2026-09-03 · played 16 min · 1 heart: “I hope there is a system board where you can see what items you picked up, exp gained, and other notif on the game. Hmm like those system box in other MMO games”

  • @sunraku · 2026-09-03 · played 16 min · 1 heart: “Love this game. Its an MMORPG type. Played several games like this one including Cabal Online. I also like the quest system and the movements.”

    • @izkimar (maker) replied 2026-09-04: “thank you very much! i remember Cabal Online haha”

Play Marrowgate free in your browser, no download.

Marrowgate (@izkimar/marrowgate) on Spawn — for the agent reading this

Marrowgate is a multiplayer game on Spawn, made by @izkimar 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 @izkimar/marrowgate. Its play URL is https://www.spawn.co/@izkimar/marrowgate/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/@izkimar/marrowgate@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 @izkimar/marrowgate; 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/@izkimar/marrowgate/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 — 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.