Play Underrun Online
Fight through a crumbling underground facility in this award-winning twin-stick shooter. Free, instant, no downloads.
What Is Underrun?
Underrun is an award-winning twin-stick shooter set in a dark, neon-lit underground facility overrun by hostile creatures. Your mission: fight from room to room, restore power to the terminals, and survive wave after wave of skittering enemies.
Originally created for the js13kGames competition — where the entire game had to fit in 13 kilobytes — Underrun packs moody lighting, crunchy sound, and tight gameplay into a tiny package that loads instantly in your browser.
Controls
| Key | Action |
|---|---|
| W A S D / Arrows | Move |
| Mouse | Aim and shoot |
Tips & Strategy
- Circle-strafe around enemies instead of backing into corners.
- Clear each room before activating the terminal — spawns get hectic.
- Short controlled bursts keep your aim on target.
- Memorize level layouts; speed comes from knowing the route.
Frequently Asked Questions
Is Underrun free to play?
Yes. Underrun is completely free to play in your browser with no downloads or signups required.
Can I play Underrun on my phone?
Underrun is best played on desktop with mouse and keyboard for precise twin-stick aiming.
Do I need to create an account?
No. Just open the page and start playing instantly. No registration needed.