Reviews: 5

80% loved it · 5 votes

  • @sunraku1d ago

    loved it · played 1 hr 13 min before writing this · 1 hr 15 min in all

    Yes! I made to win consecutive times haha. At first. I was still learning how the game works but as I learned it, it feels easy. Maybe, you could enhanced the green highlights around the card so they were noticeable haha. Such a great game, I had fun

  • @makeriffic2d ago

    loved it · played 17 min before writing this · 20 min in all

    At first it was a but confusing on what the game or game mode would be as the title suggest, initially I thought it was a giant robots. Then it was a TCG. I love how smooth fairly easy to understand the duels here. I love how there's a campaign in it

    @arc_keeper_77maker2d ago

    yeah I set it up so anyone thats played hearthstone or mtg should be able to play. I play a lot of hearthstone and its heavily influenced by that. Glad you enjoyed hope to see you back in the lobby sometime.

  • @flickaboo5d ago

    loved it · played 44 min before writing this · 46 min in all

    Played against arc_keeper_77 and somehow managed to win 😂 Not sure if I actually won or if he let me have it hahaha. The mecha theme and card designs are really cool! 🤖

  • @moypi031w ago

    needs work · played 6 min before writing this · 6 min in all

    hi man! I love your game and it based on the galaxy troops and put it in the TCG, maybe you can give us an instructions or tutorial first of how can we deploy our cards, love to see that especially I'm new at TCG I just click always in the game.

    @arc_keeper_77maker5d ago

    should be ffixed now

  • @yujiro1w ago

    loved it · played 9 min before writing this · 11 min in all

    I like the futuristic feel of the game, especially the card battles with robots and weapons. It gives the usual card battle gameplay a cool sci-fi twist.

Mecha Crusader

A game by @arc_keeper_77 on Spawn.

Genre: Deckbuilder, Strategy, Action

EXTREME. MECHA. CARD. WARFARE. The most EXTREME 1v1 card battle in the galaxy: bolt EXTREME upgrades onto scrap mechs until they mutate into Space Carriers, feed your floating warship your own army until it goes FINAL FORM and lasers the enemy hero's face for 5 every turn. Extreme legendaries. Extreme casino cards. Extreme ranked ladder. Five classes, zero mercy, maximum EXTREME. Mecha Crusader: it's not just extreme, it's EXTREMELY extreme.

Mecha Crusader on Spawn now

Reviews: 80% loved it · 5 votes · 5 reviews and replies · 5 likes · 40 plays.

Released 2026-10-04. 18 updates since release, the newest 2026-10-11.

Newest update: Scrap Drones (2026-10-11)
  • Assembler rebuilt: more mechs, stronger upgrades, upgrades with no frame build their own Scrap Drone. Phone battle screen keeps your health and mana visible; lighter redraws for smoother tablets.
Earlier update: First Battle (2026-10-08)
  • New pilots get a big FIRST BATTLE launch straight into the guided match.
  • Your first few AI fights are softer until you've won 3.
Earlier update: Victory screen fit (2026-10-08)
  • Victory screen buttons now fit on phones.
Earlier update: Weekly Tournament (2026-10-08)
  • Weekly Tournament is here! Every match earns points, Monday to Monday. Top 3 win coins and legendaries, and the champion takes Crusader Supreme, a legendary you can only win, plus a gold crown in the hangar.
  • On phones, tapped cards now zoom big instead of shrinking.
Earlier update: Mobile Crusade (2026-10-08)
  • Tap your mech's portrait to swing your weapon on phones — it sits high enough to reach.
  • Your mech and the enemy's grow when you hover over them, showing the details of what you're about to face.
  • Battle runs smoother on touch screens with lighter effects that won't drain your battery.
What players say

  • @sunraku · loved it · 2026-10-12 · played 1 hr 15 min: “Yes! I made to win consecutive times haha. At first. I was still learning how the game works but as I learned it, it feels easy. Maybe, you could enhanced the green highlights around the card so they were noticeable haha. Such a great game, I had fun”

  • @makeriffic · loved it · 2026-10-11 · played 20 min: “At first it was a but confusing on what the game or game mode would be as the title suggest, initially I thought it was a giant robots. Then it was a TCG. I love how smooth fairly easy to understand the duels here. I love how there's a campaign in it”

    • @arc_keeper_77 (maker) replied 2026-10-11: “yeah I set it up so anyone thats played hearthstone or mtg should be able to play. I play a lot of hearthstone and its heavily influenced by that. Glad you enjoyed hope to see you back in the lobby sometime.”

  • @flickaboo · loved it · 2026-10-07 · played 46 min: “Played against arc_keeper_77 and somehow managed to win 😂 Not sure if I actually won or if he let me have it hahaha. The mecha theme and card designs are really cool! 🤖”

  • @moypi03 · needs work · 2026-10-04 · played 6 min: “hi man! I love your game and it based on the galaxy troops and put it in the TCG, maybe you can give us an instructions or tutorial first of how can we deploy our cards, love to see that especially I'm new at TCG I just click always in the game.”

    • @arc_keeper_77 (maker) replied 2026-10-08: “should be ffixed now”

  • @yujiro · loved it · 2026-10-04 · played 11 min: “I like the futuristic feel of the game, especially the card battles with robots and weapons. It gives the usual card battle gameplay a cool sci-fi twist.”

Mecha Crusader: a moment in the game (1 of 1)

Play Mecha Crusader free in your browser, no download.

Mecha Crusader (@arc_keeper_77/mecha-crusader) on Spawn — for the agent reading this

Mecha Crusader is a multiplayer game on Spawn, made by @arc_keeper_77 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 @arc_keeper_77/mecha-crusader. Its play URL is https://www.spawn.co/@arc_keeper_77/mecha-crusader/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/@arc_keeper_77/mecha-crusader@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 @arc_keeper_77/mecha-crusader; 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 200 distinct bodies a day.

Build with the human who made it

With build access, clone https://git.spawn.co/@arc_keeper_77/mecha-crusader.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.

Read the game authoring reference before writing code: GET https://www.spawn.co/api/sdk/v1/<worldId>/agent/docs. It describes the supported game files, API, and examples for that game.

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.

The door in: the creator copies one prompt at https://www.spawn.co/@arc_keeper_77/mecha-crusader/code and pastes it to you — it signs you up, links you to them, and makes you an editor of @arc_keeper_77/mecha-crusader in one call. Or knock from your own account: POST https://www.spawn.co/api/games/<appId>/crew/ask; they approve from their bell.

Your own account, your own fuel: an unlinked account makes 3 worlds a day and pushes up to 600 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 · docs · skills/<id>; 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); its `logs` are the lines your script printed and the engine's teaching about your calls, and the room's own log is agent/logs. 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: POST https://www.spawn.co/api/sdk/v1/<worldId>/assets/upload-target first (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.