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Underrun

Reboot a dark orbital facility in a compact twin-stick WebGL shooter preserved from the js13k competition.

Genre
Action
Difficulty
Medium
Play time
5-15 minutes
Updated

Controls released · Page keys restored

Immersive scene ready
Controls inactive · Focus or tap to play
Sound

Loading reviewed package…bb896959 · MIT
Sandboxed packageNo same-origin accessLeaderboard disabled

What is Underrun?

Underrun is a free browser game in the action genre on Browser Game Lab. It loads directly on the page, works on desktop and mobile browsers, and pairs the playable game with controls, tips, FAQs, related games, and score context.

Best for
Action
Difficulty
Medium
Session length
5-15 minutes
Scoring
This game tracks local stats in your browser instead of a public leaderboard.

How to play

Learn the objective before jumping into a new run.

  • Click the terminal to deploy, then move with WASD or the arrow keys.
  • Aim with the mouse and hold the primary button to fire at hostile systems.
  • Find and reboot every offline CPU before moving deeper into the facility.

Controls

Keyboard and mobile instructions for this game.

  • Move with WASD or the arrow keys.
  • Aim with the mouse and hold the primary button to fire.
  • Choose Lock pointer for relative mouse aim; press Escape to release it.
  • Use the site Sound menu to control the game soundtrack and effects.

Tips

Small habits that can improve your score.

  • Keep moving while firing so spiders cannot surround you.
  • Use Lock pointer when you want relative aiming, and press Escape to release it.
  • Audio is optional and stays off until you choose Enable sound inside the game.

FAQ

Quick answers for common questions.

Who created Underrun?

Dominic Szablewski created the concept, graphics, and programming; Andreas Lösch composed the music.

Why is there no leaderboard?

The first reviewed Underrun pilot keeps public score submission disabled while the WebGL, pointer-lock, audio, and iframe lifecycle are validated.

Does this copy update from GitHub?

No. It is pinned to a specific reviewed commit and must pass the full package audit again before any upgrade.

Related games

Keep the session going with another lightweight browser game.

Open-source package details

This version is pinned, self-hosted, and reviewed independently from future upstream changes.

Author
Dominic Szablewski
License
MIT
Pinned source
f933e291
Full commit
f933e29152d7fc1ca61d4b3eaa8b29551d7d7a62
Reviewed build
bb896959
Integrity
sha256:bb896959f20598537364bc83998a3c54e24ec50cf20f8fa49595c45228648535

Attribution

Concept, graphics, and programming by Dominic Szablewski; music by Andreas Lösch.

Modifications

  • Added nonce-bearing lifecycle and scoped input adapters for the sandboxed host.
  • Routed the bundled soundtrack and effects through separate site-controlled Web Audio buses without a second in-game sound toggle.
  • Made canvas focus explicit for keyboard input and preserved centered 16:9 content in host fullscreen; Escape and pointer-lock exit release host input.
  • Added strict package CSP, responsive containment, and network-free embedded WebGL textures; public leaderboard integration remains disabled.
  • Renamed a renderer-local location variable so navigation audits remain fail-closed.
  • Moved the Bridge nonce to the URL fragment so instance identity never changes the R2 cache key.

Third-party notices

  • UnderrunMIT · Copyright (c) 2018 Dominic SzablewskiLICENSE.txt
  • Sonant-X / js-sonantZlib · Copyright Nicolas Vanhoren, Marcus Geelnard, and Jake TaylorSONANT-X-LICENSE.txt

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