Underrun

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Game details

Underrun

New

Fight through a hacked facility as a lone hacker-soldier, gunning down rogue spider-bots and sentries while rebooting every CPU to unlock the exit and reach the next level.

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Play Underrun Online for Free

Underrun drops you into a compromised facility crawling with rogue security systems. Armed with a plasma pistol, you fight your way through three increasingly dangerous levels, gunning down skittering spider-bots and stationary sentry turrets while hunting down every offline CPU terminal scattered across the map. Reboot all of a level's systems to unlock the path forward — but watch your health bar, because damage adds up fast and going down means restarting the level from your last checkpoint. Health pickups are scattered around each map to keep you in the fight, and the retro CRT-terminal presentation and dark synth soundtrack give every corridor a tense, claustrophobic edge. It's a short, replayable arcade shooter built for quick sessions: three tight levels, no fluff, just clear the systems and get out.

How to play

Click anywhere to start. Move through each level and shoot every spider-bot and sentry you find, then locate and reboot all of the level's offline CPU terminals — the notice at the top tracks how many are left. Once every system in a level is rebooted, the exit opens and you move to the next level. Clear all three levels to win. If your health reaches zero you restart the current level from the beginning, so grab health pickups when you see them.

Controls

Move: Arrow keys or WASD. Aim: mouse. Shoot: hold the left mouse button. Click once at the start screen to enable audio and begin.

Frequently asked questions

Is Underrun single-player or multiplayer?+

Underrun is playable solo in this browser tab. Check the game details panel on this page for the exact categories and tags that describe its mode.

Is Underrun free to play online?+

Yes, Underrun is free to play online with no payment required to start. There is no download or signup needed — just open the page and press play.

Can I play Underrun on mobile?+

Underrun is built for desktop with keyboard and mouse controls. It may open on mobile, but a computer gives you the intended controls.

Do I need to download Underrun?+

No download is needed. Underrun loads instantly in your browser on desktop, laptop, phone, or tablet.

How do I play Underrun?+

What are the controls for Underrun?+

Move: Arrow keys or WASD. Aim: mouse. Shoot: hold the left mouse button. Click once at the start screen to enable audio and begin.

Is Underrun safe to play?+

Yes. Underrun is hosted for browser play with no installer or executable, so nothing is added to your device.

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