Repterra Web — full game: base building, power grid, taming & breeding, aquatic raiders, day/night, save/load
- Isometric canvas RTS vs dinosaur waves (fan demake of Repterra) - Economy: houses/taxes, farms, foresters, quarries; colonist staffing - Power grid: generators extend build range; brownout + recovery - Defense: walls/gates, watchtowers (AA), cannon towers (ground-only) - Taming: Primal Pen + Tamers collar weakened dinos; pets obey commands - Breeding: tamed pairs incubate eggs at the pen; hatchlings grow up - 7 dino species incl. flying Pteranodons and lake-raiding Suchomimus - Telegraphed waves with direction arrows; day-15 final horde; 3 difficulties - Day/night cycle, fog of war, minimap, synth audio, 1x-3x speeds - Save/Load/Continue + dawn autosave (full JSON state snapshots) - Tests: 80-assertion headless suite, browser boot + E2E, balance harness
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# REPRTERRA WEB 🦖
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A **fan-made browser demake** of [Repterra](https://store.steampowered.com/app/2768380/Repterra/)
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(Chute Apps / MicroProse) — the base-building survival RTS best described as
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*"They Are Billions, but the horde can fly."*
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Everything is hand-drawn on canvas at runtime — no image assets, no build step,
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no dependencies. Plain JS + HTML + CSS.
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## Play
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```bash
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npm start # serves http://127.0.0.1:8933
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```
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…or just open `index.html` directly in a browser (works from `file://` too).
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## The loop
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1. **Grow** — Houses raise population cap and pay taxes; colonists arrive at your
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Command Center and staff Farms, Forester Huts and Quarries.
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2. **Expand** — Generators produce energy *and* extend your power grid; you can
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only build touching your grid. Overload it and newest buildings go dark.
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3. **Fortify** — Walls and Gates block ground dinos. Towers shred them.
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4. **Survive** — telegraphed waves attack every couple of days
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(a warning arrow shows *where* they'll hit). Roaming packs prowl the map —
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kill them before day 15, because…
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5. **☠ THE FINAL WAVE** — every surviving dino on the map charges your Command
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Center. Lose the HQ and the colony falls.
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### ⚠ The sky is NOT safe
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Pteranodons **fly over walls**, straight for your soft economy buildings.
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Cannon towers can't shoot up — keep Watchtowers and Rangers covering the air.
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### ⚠ Neither is the water
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From day 8 (normal), **Suchomimus raids emerge from the lakes** — a fully
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walled base with no waterfront watch is still on the menu.
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### 🦴 Turn the horde into your army
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Build a **Primal Pen**, train a **Tamer**, weaken any dino below 32% HP and the
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Tamer slips a capture collar on it. Tamed dinos fight for the colony —
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right-click to give them a new guard post or order an attack. The Pen heals
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your pets and each Pen adds +2 tame slots. (A T-Rex is too powerful to tame.)
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### 🥚 Breed them
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Park **2+ tamed dinos** beside a powered Pen and they'll incubate eggs (60 food
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each, max 2 per Pen). Hatchlings start small and grow into full-size fighting
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adults — a self-sufficient dino economy.
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### 💾 Your colony persists
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Save from the pause menu, autosave at every dawn, and hit
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**▶ Continue saved colony** on the main menu. Saves are plain JSON snapshots of
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the whole simulation — world depletion included.
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## Dinosaur roster
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| Dino | Threat |
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|---|---|
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| Compsognathus | fast swarm fodder |
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| Velociraptor | quick flanker |
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| Dilophosaurus | ranged spitter |
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| Triceratops | wall-crusher (×2.5 building dmg) |
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| Pteranodon | ☠ flying, ignores walls |
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| Suchomimus | 🌊 amphibious — raids from lakes |
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| Tyrannosaurus Rex | boss, smashes anything, untameable |
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Plus roaming packs of all of the above from minute one. Day turns to night
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over the colony (powered buildings glow warm after dark).
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## Controls
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| Input | Action |
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|---|---|
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| WASD / arrows / screen edge | pan camera |
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| Mouse wheel | zoom to cursor |
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| Middle-drag | grab-and-drag pan |
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| Left click | select / place |
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| Left drag | box-select Rangers |
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| Right click | move order · focus-fire a dino · rally point (barracks/pen selected) · pet move/attack (tamed dino selected) · capture priority (tamer selected) |
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| `1`–`9` | build hotkeys |
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| Shift-click | multi-build · hold to keep placing walls |
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| `Space` / `P` | pause |
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| `F` | jump to HQ |
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| `Del` | demolish selected building (+50% refund) |
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| `M` | mute |
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| `+` / `-` / `0` | game speed 1×/2×/3× |
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## Tech notes
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* ~5k lines of dependency-free vanilla JS (`js/*.js`, plain script tags).
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* Isometric canvas renderer with depth sorting, fog of war, particles,
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animated procedural sprites (every dino/building drawn in code).
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* Sim core is DOM-free → fully headless-testable:
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* `npm test` — smoke suite (~70 assertions: placement rules, economy,
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pathfinding, waves, power-grid chains, taming & pet combat, breeding,
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save/load fidelity, victory & defeat paths).
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* `npm run balance` — scripted auto-player runs full games at every
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difficulty and reports survival curves (relative difficulty signal).
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* `node test/browser.js` / `test/e2e.js` — real-Chromium boot + interaction
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tests, including a save → reload → continue lifecycle
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(needs `npx playwright-core install chromium-headless-shell`).
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*Fan project for personal enjoyment; not affiliated with Chute Apps or MicroProse.*
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