UNDERRUN

How to play

1. Search each facility level for the blue offline systems and reboot them.
2. Keep moving, aim at nearby threats and fire before they reach you.
3. Restore all three systems to finish the run. Leaving the game restarts the current run.

Make your move

• Keyboard and mouse: WASD or arrow keys move; mouse aims; hold the left mouse button or Space to fire. P or Escape pauses.
• Touch: hold and drag on the left half to move; hold and drag on the right half to aim and fire.
• Standard gamepad: left stick moves, A fires, D-pad aims and Start pauses. Physical devices and Tesla are unverified.

A small head start

• Clear the blue systems to reveal the next route.
• Keep distance from spiders and sentries while you aim.
• Later levels spawn more spiders; pause whenever you need.

Compatibility notes

Touch and keyboard controls are implemented. Physical phones, controllers and Tesla browsers await device testing.

Play style: Point and move. Original in-game text is English. Leaving or changing language restarts the round; personal bests remain local.

Check this game on your device ↗

Compatibility · Input check

Credits & source

Dominic Szablewski · MIT + Sonant-X zlib. MIT notices and source · Source code

Updated: 2026-10-14. Free to play. Pages may contain disclosed affiliate links; Google ads are inactive.