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Underrun

Action2–5 min✓ Play-tested · Sep 6, 2026
No download · no sign-up · plays right here
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Click play to start. Save support varies by game.

How to play

How to play Underrun

  1. Click to initiate deployment, then move with WASD or the arrow keys.
  2. Aim with the mouse and hold the mouse button to shoot.
KeyboardMain controls (see in-game help)MousePoint and click

Restart every offline CPU in each of three levels by approaching it. Bringing all CPUs online advances you to the next level.

About

About Underrun

A top-down action game set in a failing facility, with hostile creatures, sentries, health pickups, and terminal messages.

Play better

Quick tips

01

First move

Click after the deployment message, then move away from the starting area while aiming down the first open corridor.

02

Practical tip

Keep moving while firing, and save health pickups until you are hurt: each restores one of your five health units and is consumed even at full health.

Go a little further

Underrun: Reboot Every System in the First Facility

Learn safe room clearing, terminal routes, and the complete first-level objective in Underrun.

Read the guide