100 Days After — complete playable survival strategy game
- Seeded procedural runs (survivors, locations, weather, events) - 100-day campaign with 5 phases, scripted story beats, Day-100 finale - 8 endings incl. hidden 'First Light Again' - Data-driven events (people/world/story packs) with callback chains - Relationships, memories, grief, karma/hope systems - Tactical encounters (fight/hide/run/negotiate) with honest odds - 8 upgradeable camp buildings, 13 location templates - Canvas parallax scenes, procedural SVG portraits, weather FX - Synthesized adaptive audio (WebAudio, no assets) - Save slots + autosave (localStorage), shareable seeds - Tests: headless multi-seed simulator + browser E2E (playwright)
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# 100 DAYS AFTER
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*A survival story in one hundred days.*
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Lead a small band of survivors through a world ended by **Grayfall** — an engineered
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blight that came down with the dust. Every day you have a handful of actions, a ledger
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of hungry mouths, and a hundred ways to lose someone. What happens on Day 100 depends
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on what you built, learned, earned — and who you buried.
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---
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## Play
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```bash
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npm install
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npm run dev # → http://localhost:5199
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```
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Production build: `npm run build` then `npm run preview`.
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### Controls
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- Everything is mouse-driven. Hover anything with a dotted underline for tooltips.
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- Each day: spend limited **actions** (SCAVENGE / EXPLORE / HUNT / BUILD / TALK /
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TRADE / REPAIR / REST / TRAVEL), then press **END DAY** and read the night ledger.
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- Click survivors for their full sheet: skills, traits, relationships, memories.
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- The MAP tab previews each location's illustrated scene; the JOURNAL keeps your story.
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- Encounters show honest odds for Fight / Hide / Run / Negotiate. Estimates. Not promises.
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## The shape of a run
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| Days | Phase | What happens |
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|------|-------|--------------|
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| 1–20 | Early Survival | Scarcity, first strangers, learning the valley |
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| 21–50 | Expansion | New faces, bigger camp, the wide world opens |
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| 51–80 | Escalation | Raiders, herds of the Dust-Sick, hard choices |
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| 81–99 | Endgame | Radio fragments resolve; escape plans form |
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| 100 | Finale | Convoy, boats, the last raid… or something nobody told you about |
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**Eight endings**, including one hidden ending that requires three recovered radio
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parts, a seed vault, a running generator, and enough hope to be dangerous.
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Runs are seeded and fully reproducible — same seed, same world. Share seeds.
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## Architecture
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Clean separation of state, simulation, content and presentation:
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```
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src/
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engine/ pure logic, zero DOM
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types.ts all shared types (GameState is plain serializable data)
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rng.ts seeded mulberry32 + cursor (exact reproducibility)
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state.ts new-game generation (survivors, map, weather, stores)
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sim-core.ts caps, morale floor, defense rating, relationship math
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eventctx.ts the mutation API events are written against (+ death & grief)
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sim.ts actions, tactical encounters, night resolution, story beats
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ending.ts ending selection + epilogue data
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save.ts slots + autosave (localStorage), versioned envelopes
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content/ data-driven game content
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survivors.ts names, occupations, traits, personalities, goals, weapons
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locations.ts 13 location templates (loot tables, risk, specials)
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buildings.ts 8 upgradeable structures
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enemies.ts enemy archetypes
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world.ts weather table, campaign phases, lore fragments
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events/
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people.ts strangers, traders, internal conflict, callback chains
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world.ts storms, creatures, factions, discoveries
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story.ts scripted beats (Day 2→99), Day-100 finale, all endings
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ui/ presentation
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portraits.ts procedural SVG character portraits with moods
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scene.ts canvas parallax scenes, weather particles, camp rendering
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ui.ts screens, HUD, modals, event/combat flow
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audio/audio.ts synthesized wind/rain/thunder, adaptive music pads, SFX
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scripts/
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headless.ts auto-plays full campaigns across N seeds:
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crash checks, determinism proof, balance histogram
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smoke.mjs real-browser test: boot → play days → save → reload → load
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```
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Adding content never touches core systems: new events are entries in `content/events/*`
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(a title, conditions, choices with requirements, and outcome functions using the `ctx`
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helper API); new locations/buildings/enemies are plain data records.
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## Emergent storytelling systems
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- **Memory:** every survivor logs what happened *to them* ("Skipped supper so others could eat").
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- **Grief:** deaths ripple through relationships; close friends spiral, confront you,
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and remember on Day 99.
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- **Callback chains:** rob the caravan and it returns; spare the stranger and he
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remembers; feed the family and a package appears at the fence weeks later.
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- **Feeding priority:** food shortfalls feed the hungriest first — whoever's last in
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line develops opinions about leadership.
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- **Karma & hope** quietly steer strangers' returns, tribute demands, and endings.
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## Testing
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```bash
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npm run sim # 12 seeded campaigns, headless: crashes/determinism/balance
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npm run sim -- --seeds=40
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npm run smoke # browser E2E through the real UI (needs the dev server)
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npm run build # typecheck + production bundle
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```
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*Built as a vertical-slice-first project, expanded to the full 100-day campaign.*
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