OpenRTS

A compact, mobile-friendly 2D RTS playable in the browser. Inspired by classic C&C/Red Alert/Dune 2000 and modern browser RTS. Built with HTML, CSS, and vanilla JS (no deps).

Features

• Grid map, camera with zoom, mouse/touch input, mobile-friendly UI.
• Units: Worker (harvest), Soldier (ranged). Buildings: HQ, Refinery, Barracks, Turret, Power.
• Economy with ore patches, harvesting, dropoff at HQ/Refinery, population cap from buildings.
• Selection (click/tap, drag-box), commands: Move, Attack, Harvest, Stop.
• Build placement with proximity rule (near HQ), production queues, pop limits.
• A* pathfinding and simple collision handling.
• Combat with hitscan, HP bars, and turret auto-defense.
• Simple enemy AI that spawns waves and targets your HQ. Destroy enemy HQ to win.

Run

• Open index.html in any modern browser (Chrome/Edge/Firefox/Safari). No server required.

Controls

• Selection: Click/Tap a unit/building. Drag to box-select units. Selected entities show a cyan ring/outline.
• Pan/Scroll: Toggle the "Pan" button to drag the map. Use range slider to zoom.
• Commands:
  • Move: Click ground.
  • Attack: Click enemy.
  • Harvest: Click ore (workers only).
  • Stop: Stops selected units.
• Build: Select HQ (or relevant building), then click a build button (Refinery/Barracks/Turret/Power). Tap on the map near HQ to place.
• Produce: Select HQ/Barracks to produce Worker/Soldier.
• Keyboard shortcuts: M (Move), A (Attack), H (Harvest), S (Stop), Esc (Cancel).

Tips

• Start harvesting early with your Worker to fund builds.
• Build a Refinery for faster drop-off and a Power to extend population cap.
• Place a Turret near your HQ or chokepoints for early defense.
• Enemy waves escalate slowly; prepare before engaging the enemy HQ.

Tech Notes

• Canvas renders a tile map at 32px/tile internally. Camera manages zoom and translation.
• A* uses 4-way movement and avoids building-occupied tiles.
• Turrets auto-target enemies within 6 tiles, ~0.7 shots/sec.
• Hitscan damage for performance; projectiles omitted to keep code compact.

Known Limitations / Future Ideas

• No building power grid or advanced tech tree.
• Basic AI; could add scouting, expansion, path grouping, or micro.
• Add rally points, guard/hold position, and formation movement.
• Sound effects, sprite art, and minimap would improve immersion.

License

MIT