Galaxy Swarm — An Endless Space Survival Shooter

Galaxy Swarm is a fast, polished, endless top-down space shooter built with vanilla HTML5, CSS and JavaScript — no libraries, no frameworks, no build step, no backend. Pilot your interceptor through an infinite procedurally decorated galaxy, survive escalating waves of hostiles, and get stronger every run.

Features

5 Unlockable Weapons: Pulse, Beam, Spread, Piercer and Laser — bought permanently in the Ship Yard
8 Ship Skins including an animated rainbow Prism livery, with engine-trail recoloring
Persistent Ship Yard shop with buy / equip / owned states and a banked crystal wallet
Upgrade Tree between waves with 3 hidden evolutions — Phoenix, Voidstorm and Eclipse
9 Achievements with on-screen unlock toasts plus lifetime stats (runs, kills, best stage)
Hidden Constellation Secrets: discover 8 department landmarks to unlock a secret Mogul ship class
Secret systems: a Hyperdrift orbit and automatic wide-angle “vista” camera moments while idle
Live attract mode: an auto-play battle animates behind the main menu
Animated first-time tutorial that guides new players through the basics
Procedural sci-fi BGM & sound effects (WebAudio), each with its own toggle
WebGL2 instanced stars + bloom with an automatic Canvas 2D fallback
Fully offline single file: embedded font, no external requests, works from any folder
Touch controls + responsive layout for mobile portrait and landscape
localStorage persistence for the wallet, shop unlocks, settings, stats and achievements

How to Play

Fly with WASD or the arrow keys (or the on-screen dpad on mobile), aim with your mouse, and your cannons fire automatically. Destroy the pink drones, purple hexes and heavy yellow cruisers that swarm you, collect XP stars and crystals, and clear each wave to earn rewards and pick an upgrade. Chain kills without taking damage to build your combo multiplier.

Easy to Install

The entire game is a single self-contained index.html. Upload it to any static web host and open it — no database, no configuration, no build tools, no internet required.

Browser Support

Chrome 56+ / Edge 79+
Firefox 51+
Safari 15+ / iOS Safari 15+
Android Chrome 56+ (touch)
Uses WebGL2 for the starfield and automatically falls back to Canvas 2D on older devices

Documentation

A full documentation file is included with real screenshots, a visual guide for non-coders, a customization guide (CONFIG object & CSS variables), a troubleshooting section and an F.A.Q.

Made by Tawajo. All code, art, audio and effects are original work.

Galaxy Swarm | Open Sector Survival HTML5 Game