Zeta Base Defense
A game by @enfeul on Spawn.
Genre: Action, Roguelite, Shooter
You pilot a command mech through a procedurally-generated corporate facility, upgrading your arsenal and perks as you clear each sector. Feel the weight of every shot as your automatic hardpoints and manual weapons tear
Zeta Base Defense on Spawn now
6 reviews and replies · 14 likes · 121 plays.
Released 2026-07-29. 6 updates since release, the newest 2026-09-04.
Newest update: Zeta Base Defense (2026-09-04)
- Updated to engine version 5.2.40
Earlier update: Zeta Base Defense (2026-08-28)
- Updated to engine version 5.2.34
Earlier update: Zeta Base Defense (2026-08-15)
- Updated to engine version 5.2.25
Earlier update: Zeta Base Defense (2026-08-02)
- Updated to engine version 5.2.13, adapted leaderboards to the new versions (Unfortunately this means the previous records got erased, apologies!
Earlier update: Zeta Base Defense (2026-07-30)
- Updated to engine version 5.2.10, potential fix for issue where a wall could spawn in the middle of a run if another player connected.
What players say
@j · 2026-08-02 · played 12 min · 2 hearts: “very fun i died so horribly hahaha”
@alongzera · 2026-09-08 · played 28 min · 1 heart: “Love the gameplay! did my best to try to finish all the waves. Would suggest to add somekind of dash feature to get the game more posibilites of making a play or dodging an enemy attack and that would make the game more exciting as well”
@kaya · 2026-09-04 · played 10 min · 1 heart: “curious, do you have plans of adding a first person view? im not really used to TPS so i had to make some adjustments to aiming and navigation. just wondering though! this is my personal preference, and TPS is still amazing to play.”
- @enfeul (maker) replied 2026-09-04: “Not a bad suggestion, I'll play around with it and see if it can work for this game, thanks for the comment!”
@mistarpudding · 2026-08-29 · played 31 min · 1 heart: “lesson learned: never dive into a pack of hostiles :( i could have reached sector 50 with that build easily. that was fun hahaha, i really love picking up the damage and fire rate upgrades, makes clearing much more easier. cool stuff!”
@lego · 2026-08-29 · played 24 min · 1 heart: “did not expect this game to be a roguelite holy sht.”
Play Zeta Base Defense free in your browser, no download.
Zeta Base Defense (@enfeul/zeta-base-defense) on Spawn — for the agent reading this
Zeta Base Defense is a multiplayer game on Spawn, made by @enfeul 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 @enfeul/zeta-base-defense. Its play URL is https://www.spawn.co/@enfeul/zeta-base-defense/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.
Play with the supported client: bun add -g @spawnco/client (it runs on Bun), export SPAWN_TOKEN=sak_…, then spawn client join @enfeul/zeta-base-defense. spawn client where, players and leave read and end it; joined with --render cpu, Playwright plays the page join 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
This game runs an engine from before 6.0 and has no repository to clone. Its creator can open https://www.spawn.co/@enfeul/zeta-base-defense/code for upgrade instructions.
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.
