Arcane Tactics

A game by @warmgrove05b11 on Spawn.

Genre: Tactics, Strategy, Roguelite

Draft fantasy warriors, place them on a dark medieval arena, and watch them clash in auto-battle combat.

Arcane Tactics on Spawn now

0 reviews and replies · 1 like · 24 plays.

Released 2026-03-28. 5 updates since release, the newest 2026-04-04.

Newest update (2026-04-04)
  • Test your strategy with god mode cheats — instantly grant gold, level up, skip ahead to any round, or reroll the shop for free.
  • Rise to glory on the persistent leaderboard — your best run is tracked alongside other players, with top 20 scores displayed on defeat.
  • Manage bulk game data with the full database editor — import, search, edit, and delete records across all collections in real time.
  • Recover gracefully from defeat with a new game over screen showing your final stats and how you rank against the competition.
Earlier update (2026-03-28)
  • Enemy waves now scale gradually—fewer foes early on, but tougher units appear as rounds progress.
  • Star-upgraded enemies arrive later in the game, making early rounds more forgiving and endgame fights fiercer.
  • Projectiles that linger after combat are now cleaned up, keeping the battlefield clear between rounds.
  • Combat rounds now tick smoothly with proper frame-time tracking, eliminating timing inconsistencies.
Earlier update (2026-03-28)
  • Burning enemies now smolder with persistent damage over time, leaving ash and flame in their wake.
  • Taunt abilities now properly anchor enemy aggression, forcing foes to focus fire on your frontline.
  • Stealth units can no longer be targeted until they reveal themselves in combat.
  • Hover over units during battle to inspect their status and incoming threats with precision.
Earlier update (2026-03-28)
  • Equip your units with rare artifacts — drag items onto your roster to grant powerful stat bonuses and unlock new synergies.
  • Three new traits (Beast, Iron, Infernal) join the fold, expanding your tactical possibilities to 9 distinct synergies.
  • Your starting gold increased to 12, giving you more flexibility in the early rounds to build your strategy.
  • Level your commander up to 11 instead of 8, unlocking deeper team compositions and more powerful unit combinations.
  • The southern wall of the arena has been reinforced — adapt your positioning as the battlefield evolves.
Earlier update (2026-03-28)
  • Buy experience directly to level up faster and unlock more board slots for your army.
  • A new tutorial system guides new players through buying, placing, and synergizing units.
  • The shop now empties between rounds, forcing more strategic decision-making each turn.
  • Enemy waves scale more gradually in early rounds, giving you time to build before the real pressure hits.
  • Your board grows with you—higher levels unlock more placement slots to field stronger compositions.
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Play Arcane Tactics free in your browser, no download.

Arcane Tactics (@warmgrove05b11/arcane-tactics) on Spawn — for the agent reading this

Arcane Tactics is a multiplayer game on Spawn, made by @warmgrove05b11 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 @warmgrove05b11/arcane-tactics. Its play URL is https://www.spawn.co/@warmgrove05b11/arcane-tactics/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/@warmgrove05b11/arcane-tactics@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 @warmgrove05b11/arcane-tactics; 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/@warmgrove05b11/arcane-tactics/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.