Is BLOCKHEAD free to play?

Yes. BLOCKHEAD is free, runs in your browser, and needs no account. Nothing to download, no plugin, no sign-up — open the page and play.

Do I need to download or install BLOCKHEAD?

No. BLOCKHEAD runs entirely in the browser on desktop. There is nothing to install and no launcher to sign in to.

Which AI model made BLOCKHEAD?

BLOCKHEAD was written by Opus 5, a model from Anthropic. The prompt that produced it is published on this page, so you can see exactly what it was asked for.

Can I play BLOCKHEAD on my phone?

BLOCKHEAD has not been marked as working on phones, so it is best played on a desktop or laptop.

Does BLOCKHEAD keep a high score?

Yes. Any score BLOCKHEAD reports goes to the leaderboard under the game, and you do not need an account for it to count.

How much did BLOCKHEAD cost to make?

$45.00 in model usage, running Opus 5, over about 259 minutes of building. Every game here records what it cost, which is the point of the site.

BLOCKHEAD

Free action game · plays in your browser · made with Opus 5

★★★★⯪4.5 · 6 votes

BLOCKHEAD is an action game that loads straight in the browser. Free to play, no install, no registration. It sits across arcade and shooter as much as action. Opus 5 wrote the code; the prompt that produced it is on this page.

About BLOCKHEAD

A top-down wave shooter in the spirit of the flash-era arcade originals. There is no shop and nothing carries over: every run starts with a pistol, and the only currency is how fast you kill. Every kill inside the window steps your multiplier up by one, and that multiplier is the whole arsenal — weapons and upgrades are spread the full length of the ladder, with the Devil Gun waiting at x60. Eleven weapons, eight rooms across two wings (the undead streets and the machine facility), endless waves, and a boss every tenth wave built specifically to stop you hiding behind a barricade.

How was BLOCKHEAD made?

Creator

Drakoniux

Model

Opus 5Anthropic

Cost to build

$45.00

Tokens used

6,000,000

Build time

259 min

The prompt behind BLOCKHEAD

Build a top-down arcade zombie shooter as a modern game: a menu with character and room select, waves of enemies, crates that hand out health and ammo, the score multiplier that unlocks weapons as it climbs, bosses, and a score screen on death — the same mechanics the genre is built on, brought up to 2026 in UI and attention to detail.

Categories and tags

Questions about BLOCKHEAD

Is BLOCKHEAD free to play?: Yes. BLOCKHEAD is free, runs in your browser, and needs no account. Nothing to download, no plugin, no sign-up — open the page and play.
Do I need to download or install BLOCKHEAD?: No. BLOCKHEAD runs entirely in the browser on desktop. There is nothing to install and no launcher to sign in to.
Which AI model made BLOCKHEAD?: BLOCKHEAD was written by Opus 5, a model from Anthropic. The prompt that produced it is published on this page, so you can see exactly what it was asked for.
Can I play BLOCKHEAD on my phone?: BLOCKHEAD has not been marked as working on phones, so it is best played on a desktop or laptop.
Does BLOCKHEAD keep a high score?: Yes. Any score BLOCKHEAD reports goes to the leaderboard under the game, and you do not need an account for it to count.
How much did BLOCKHEAD cost to make?: $45.00 in model usage, running Opus 5, over about 259 minutes of building. Every game here records what it cost, which is the point of the site.

Version 2.3 · updated 2026-09-08

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