Ground Zero Hero Demo is free on Steam

Check out the demo for Ground Zero Hero! Battle the mutated fauna of a radiated wasteland. Absorb their forbidden goo and become the ultimate mutant!

About Ground Zero Hero Demo

GROUND ZERO APRIL 2026 SUPER DUPER DEMO

The world ended. It got worse. Now it is somehow your problem.

Dive headfirst into a radioactive dumpster fire of mutant chaos, cosmic nightmares, and government-level bad decisions in Ground Zero Hero Demo, a retro-fueled adventure where the apocalypse is equal parts terrifying, absurd, and probably avoidable.

ABOUT THIS DEMO

Put on your mutant hat, grab whatever goo still works, and stumble heroically into the blast zone as humanity’s least possibly-qualified last hope. Science pushed the big red button, reality tore open like cheap pants, and now mutants, goofy monstrosities, and unspeakable horrors are crawling out of places they absolutely should not be.

Think Saturday morning cartoon energy slammed directly into nuclear fallout, with just enough cosmic dread to make your therapist nervous.

In this demo, you will:

Survive the opening chapter of a world gone spectacularly wrong

Genres and features

ActionSingle-playerFull controller support

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Common questions

Is it really free?

Yes. Ground Zero Hero Demo is free right now on Steam, with nothing to pay.

Is this the full game?

No. A demo is a portion of Ground Zero Hero Demo — usually the opening section — published so you can try it. It is free permanently, but it is not the complete game.

Where do I claim it?

On the official Steam page. We link straight there — we never host game files or act as a middleman.

Previous times Ground Zero Hero Demo was given away
Ended	Store	Ran for
—	Steam	—

Previous times Ground Zero Hero Demo was given away

Ended

Store

Ran for

—

Steam

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