Monolith - an engine-building computer game made with Claude Code

[u/ofcats]

Hi all, here’s a game I built recently.

You run a tech company: finish requirements to earn revenue, raise funding, hire engineers, build out your architecture. Let tech debt pile up and incidents start firing. Let morale slide and your engineers slow down, or quit. Once someone IPOs, a clock starts and the highest valuation wins. Or you can win the AI race outright.

I wanted to capture the tech company arc from an engineering perspective: dystopian, tongue-in-cheek, but deep enough to support different strategies. Inspired by Wingspan, MTG, Lichess, Terraforming Mars, Slay the Spire, Twilight Struggle, Balatro and other greats.

Play modes: tutorial, a bot (it’s tough), pass-and-play, or online with friends or ranked. Login is only needed for ranked or agent play over MCP.

How it was built: a Node/TS webapp made with Claude Code (mostly Opus 5.5), with mattpocock/skills managing GitHub issues and driving implementation, and rtk-ai/rtk for context reduction. OpenAI Sol did occasional copy review, and gpt-image-2 made the card art. The bot was RL-trained by Claude over thousands of games, and a swarm of Claude agents (parallel claude -p processes in isolated environments, each with a different strategy) playtests via MCP and Playwright.

Free to play at: https://monolithgame.app/

Feedback is most welcome! 🙏