All original works — third-party engine forks (habitat-sim,
mars-sim, Lunar_Red_Alert_fork/OpenRA) are excluded. Games marked
live run in the browser; desktop mod runs outside it.
CoSE Arcade — original lunar & Martian games
Original browser games built from scratch in the spirit of the classic 1990s Maxis simulation games, with a lunar-settlement theme — vanilla JavaScript, no build step, no downloads. Click a card and play.
original gamesbrowser-playable
Maxis-tribute simsopen source
🎮 Games
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Lunar Arcade — Lunar Habitat
Maxis-tribute browser games, lunar-themed and dependency-free. The flagship Lunar Habitat is a vertical colony builder that inverts the tower-management genre: you build up 26 levels and dig down 24 into the regolith, where the surface is the most dangerous floor in the building. Also includes Boring Mining.
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Lunar Sims — Lunar Farm
Static-HTML management sims on the lunar surface. In Lunar Farm you run the farm feeding a lava-tube colony at the Marius Hills skylight: drag out grow halls up to 8×8, pick a crop per hall, and balance yield, lighting draw and water against each hall's footprint. Also includes Artemis City, a SimCity2000-style zoning game — found a colony on Shackleton crater's rim, zone habitation, trade and industry and watch density rise along the roads you run, mine the permanently shadowed floor for water ice, and launch rockets home.
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Settlers of the Moon or Mars
A choose-your-own-adventure that blends Settlers of Catan, Dungeons & Dragons and SimCity to teach space biology, biotechnology and aerospace engineering. Play it three ways — in the browser, as an AI-guided tabletop role-play, or as a 3D-printed board.
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Brute Bowl
A planner and visualiser for a Blood Bowl-style fantasy-sport match (Halfling vs Undead), using LLMs to help design teams and characters and to reason about plays — special-move tables, dice-probability interactions and the tactical spectacle of the field.
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Lunar Red Alert
A space-age total conversion of OpenRA — the libre RTS engine behind the classic Westwood games — reimagining Command & Conquer: Red Alert for a lunar/vacuum setting. A desktop mod (runs on OpenRA, not in the browser); the page is a landing/overview.