Planet Exchange

Planet Exchange is a single-player space trading and management game about buying worlds before you know what they are truly worth.

Buy fixed-price planetary listings, commission surveys, respond to uncertain field events, extract resources, invest in research, and decide when to sell. A cheap ordinary world may barely cover its costs—or reveal an exceptionally rich resource profile and earn a much rarer final archive grade.

CORE LOOP

• Buy planets from a continuously changing fixed-price exchange.

• Survey each world and make probability-driven decisions during field events.

• Extract minerals, volatiles, biological specimens, relics, and cosmic curios.

• Sell resources, reinvest in technology, and unlock higher-value listings.

• Develop depleted worlds into research, entertainment, or tourism operations.

• Complete extraction to issue a unique downloadable foil archive card recording that planet and your final trading margin.

FEATURES

• 30 visually distinct rotating planets across five rarity tiers.

• 95 illustrated resources with rarity, uses, origin records, and dynamic value.

• Interlocking Intelligence, Survey, Utilization, and Development technology trees.

• Random survey and operating incidents with visible success and failure chances.

• Persistent browser save data, English/Chinese language switching, music, and sound controls.

• Downloadable 1400 × 2000 collector card PNGs.

CONTROLS

• Mouse / trackpad: navigate menus and make decisions.

• Drag the planet: rotate the current world.

• Mouse wheel: zoom the planet view.

• Game menu: save, start a new game, adjust audio, or change language.

NOTES

• The game saves locally in your browser.

• Audio begins after your first interaction due to browser autoplay rules.

• A desktop browser and fullscreen launch are recommended.

• Save data is stored locally in your current browser. Clearing site data, using private browsing, or changing devices will reset your progress.

AI DISCLOSURE

This project contains AI-assisted visual asset generation and iterative AI-assisted development. Planet and resource artworks were curated, edited, integrated, and technically processed for this game.

CREDITS

Game design, art direction, curation, and production: Paulach

Development assistance: OpenAI Codex

Background music: “Stillness of Space” by Leonardo Paz.