Underrun Open-source
A twin-stick shooter compressed into thirteen kilobytes of WebGL: infiltrate a darkened server hall, restore the power nodes one by one and survive the things that scuttle out of the dark. Short, sharp and far more atmospheric than its file size has any right to be.
Loads the game from our own servers after you choose Play. Nothing loads before that.
How to play
WASD to move, mouse to aim, click to shoot. E to interact with terminals. Desktop keyboard and mouse required.
Keyboard-and-mouse only; no touch or gamepad support. The game is deliberately dark with flickering lights and sudden enemies, so it is not suited to photosensitive players. Health pickups announce themselves with shape and label, not colour alone.
Facts
| Estimated play time | 10 minutes |
|---|---|
| Difficulty | Medium |
| Devices | Desktop only |
| Orientation | landscape |
| Language | English |
| Audience | General, 16+ (no children-directed content) |
| Content notes | None recorded |
| License status | Approved |
| Review status | Approved |
| Last review | 2026-08-30 by agent-technical-qa 2026-08-30 (license verified via GitHub API + LICENSE file; static audit: no external requests); Alex hands-on trial requested |
Record pm-110 · imported 2026-08-30 · retest due 2026-09-06