Galaxy Swarm | Open Sector Survival HTML5 Game

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