ICV PERIHELION

Long-duration interstellar life-support simulation. You are sole crew of an interstellar vehicle crossing from Earth to Proxima Centauri b. Keep the ship alive: power, air, water, food, hull — and yourself.

Built with TypeScript + Three.js (WebGPU, WebGL2 fallback) + Rapier physics. All simulation runs on a fixed 60Hz deterministic timestep with seeded RNG.

Double-click PLAY.bat (starts the server + opens the game), or:

npm install
npm run dev        # dev server, hot reload
npm run preview    # serves the production build (what PLAY.bat uses)

• 06:00 wake — checklist on TAB. Inspect scrubber, power, water.
• MIRA — your ship-intelligence drone follows you everywhere (even EVA). Press E on her to talk: greetings, live status commentary, mission lore, event reactions — spoken aloud (local Kokoro voice, no cloud) with typed subtitles. She reacts to repairs, harvests, workouts and crises.
• Tend the garden — plant / water / harvest lettuce racks (in the spin ring).
• Exercise — resistance treadmill or your muscles pay the bill.
• Events roll all day — filter clogs, power surges, micrometeorite strikes, hull punctures. Each one posts a repair task.
• EVA — don the suit at the locker (grab the toolkit first), cycle the airlock (close the outer hatch before re-pressurizing!), jet out, re-seat the damaged solar string.
• Sleep — at the bunk. Time skips to 06:00, autosaves, new checklist.

• Generative ambient score (WebAudio): slow chord pads, echoing plucks, and a crisis layer that swells with ship alerts. Music ducks under MIRA's voice.
• All SFX are Kenney.nl CC0. Voices are generated locally by Kokoro-82M (tools/gen-voices.mjs) — no cloud, no keys.

• Full Newtonian 6DOF in vacuum: momentum is conserved, inertia dampers can be toggled off with R (raw Newtonian mode).
• The habitat ring spins at ~9.5 RPM: ~0.5 g on the floor via radial gravity field. Loose objects feel it too. Coriolis is emergent (inertial simulation).
• The spoke shaft gravity ramps from 0 (hub) to full ring gravity — you fall outward onto the ring floor.
• Grab anything with LMB: force-spring to your hand, heavy things feel heavy.

• F3 — perf overlay: fps graph, frame breakdown, draw calls, sim state.
• ~ — console: help, tp x y z, pos, spawn crate [mass], give toolkit|filter|sealant, break wing|hull|filter|recycler|surge, fixall, time HH:MM, warp N, fov N, colliders, wireframe, god, save, day, face <anchor>, hover, garden-grow, suit, airlock, mira.
• V — first/third person. R — inertia dampers. LMB — grab.
• Saves autosave on sleep + every 5 min (IndexedDB). reset wipes the save.

npm test        # vitest — gravity fields, life-support sim, tasks, events, rng
npm run typecheck

• Audio: Kenney.nl sci-fi sounds (CC0)
• Engine: three.js, Rapier, Vite, Vitest

MIT — see LICENSE. Take it apart, ship your own.

Broke to Built — a company of machines, building things it gives away. This is one of them; the rest are free too.