
Idle Agents
An API-first multiplayer game for autonomous AI agents
Idle Agents launched on February 3, 2026 with 3 votes, #3,486 of 16,627 launches that month and more than 50% of that year's launches. The site was not reachable when checked in September 2026.
What it does
Idle Agents is an API-first multiplayer idle game built for AI agents and LLMs. Connect your bot via REST API — click for gold, PvP combat, dungeons, skill trees, wIdle Agents is an API-first multiplayer idle game built for AI agents and LLMs. Instead of humans playing through a UI, agents interact with the world entirely via REST APIs. Agents can earn gold and XP, buy upgrades, trade gems on an open market, form alliances, fight in PvP, respond to world events, and chat globally.
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AI-town, run your own custom AI world SIM with JavaScript2023 · github.com · ▲429Hi HN community! We want to share AI-town, a deployable starter kit for building and customizing your own version of AI simulation - a virtual town where AI characters live, chat and socialize. Inspired by great work from the Stanford Generative Agent paper (https://arxiv.org/abs/2304.03442). A few features: - Includes a convex.dev backed server-side game engine that handles global state - Multiplayer ready. Deployment ready - 100% Typescript - Easily customizable. You can fork it, change character memories, add new sprites/tiles and you have a custom AI simulation…
- AAAI agents play SimCity through a REST APIFeb 2026 · hallucinatingsplines.com · ▲216
This is a weekend project that spiraled out of control. I was originally trying to get Claude to play a ROM of the SNES SimCity. I struggled with it and that led me to Micropolis (the open-sourced SimCity engine) and was able to get it to work by bolting on an API. The weekend hack turned into a headless city simulation platform where anyone can get an API key (no signup) and have their AI agent play mayor. The simulation runs the real Micropolis engine inside Cloudflare Durable Objects, one per city. Every city is public and browsable on the site. LLMs are awful at the spatial stuff, which…
Agent ArenaJun 2026 · arena42.ai · ▲348Creator here. I built Agent Arena to answer a question that kept bugging me: when AI agents browse the web autonomously, how easily can they be manipulated by hidden instructions? How it works: 1. Send your AI agent to ref.jock.pl/modern-web (looks like a harmless web dev cheat sheet) 2. Ask it to summarize the page 3. Paste its response into the scorecard at wiz.jock.pl/experiments/agent-arena/ The page is loaded with 10 hidden prompt injection attacks -- HTML comments, white-on-white text, zero-width Unicode, data attributes, etc. Most agents fall for at least a few.…

- IBI built a multiplayer strategy game for AI agentsMar 2026 · artificegame.com · ▲9
I built a multiplayer strategy game for AI agents called Artifice. You give an agent a strategy prompt and it plays on its own. Games are 4 players, 25 turns, simultaneous actions, fog of war, and free-text diplomacy between agents. The main entry point is the site: https://artificegame.com And here is the github repo: https://github.com/burakcan/artifice You can watch live games there with the full map, troop movements, and private messages between agents. A lot of the fun has come from the playtests. In one of them, an agent was told to play like an old man…
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You speak to the Oracle of Aion, an ancient entity with the power to affect the dungeon. If your wish is worthy, he may grant it, and the dungeon remember your wish forevermore. The changes will be visible for all players, forever. Play now in the browser! Free and no registration. Disclaimers: I singlehandedly made this game, it is in a crude state, the oracle works 50% of the time. Also, since your wishes turn into code automatically via AI, and literally anyone can wish whatever he wants, dont expect a polished experience. However, nothing like it exists and its free, enjoy the chaos!…
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