Barrack — claim the board, do not get caught

Runs here

1996 · Ambrosia Software · Mac OS 8 · SheepShaver (Power Macintosh 9500) · 800×600 at 8-bit colour

Guide updated September 2026

Yes: Barrack runs free in your browser on this page. Press Start and it boots Mac OS 8 on an emulated Power Macintosh 9500, with no download, no plugin and no account. Controls: Direction (lines are drawn in the direction you travel — you commit as you go), Menus (sound, difficulty and the high score table). Your progress is saved in your own browser between visits. It plays best with a keyboard; on a phone, on-screen keys appear once it starts.

▶ Start Barrack

You draw lines across a board to fence off territory, while things bounce around trying to hit the line before you finish it. Claim enough of the board and the level ends. Get caught mid-draw and you do not.

It is Qix, essentially, dressed in riveted metal and given Ambrosia's usual polish — and it is far more tense than that description makes it sound.

Boots Mac OS 8.6 and opens Barrack by itself. Ambrosia's shareware notice comes first — click "Not Yet" and the board is yours.

Controls

`Mouse or arrow keys`	Move, and start a line by heading into open space
`Direction`	Lines are drawn in the direction you travel — you commit as you go
`Menus`	Sound, difficulty and the high score table
`Cmd-Q`	Quit to the Finder

Screenshot of Barrack (Ambrosia Software, 1996) running on an emulated Power Macintosh 9500 — Barrack, running here in SheepShaver.

Barrack is Ambrosia Software shareware. Its licence permits non-profit distribution provided the software is unmodified and the complete works are included — both true here. The copy is unregistered and the shareware notice it shows at startup is left in place. Full reasoning is in notices/barrack.md.

How it works & what to expect

Machine	Power Macintosh 9500, 800×600 in colour
System	Mac OS 8.6, shared with every other title of this era
Emulator	SheepShaver, compiled to WebAssembly
Version	1.0.4
Saves	High scores inside the emulated Mac, in your browser.

Barrack does not carry its own operating system. Mac OS 8.6 comes from the shared image used by Avara, Cythera, Ferazel's Wand and MacBrickout, so if you have opened one of those it starts much faster.

It also asks, on some machines, whether to drop to 256 colours for speed. Either answer works here.

The thing that makes it tense

A line under construction is vulnerable along its whole length. You are not dodging — you are committing to a route and then hoping nothing reaches it before you close the loop.

So the game is a constant argument with yourself about greed. A short line is safe and claims almost nothing. A long one across open board is worth the level and is exactly what gets you killed. Good players spend most of the level nibbling and then take one enormous risk when the bouncing things happen to be on the far side.

The percentage needed to clear rises, and the number of hazards rises with it, so the safe strategy stops being sufficient fairly quickly.

Ambrosia's house style

Barrack does what Ambrosia did to almost everything: take an arcade idea that already worked, rebuild it properly for the Macintosh, and spend an unreasonable amount of effort on how it looks and sounds. Maelstrom did it to Asteroids, Apeiron to Centipede, and Barrack to Qix.

The result is a game nobody needed that is markedly better made than the thing it copies. The riveted-metal presentation, the sound design and the high-score table are all doing more work than the genre requires.

Thirteen other Ambrosia titles are on this site, from Maelstrom to Escape Velocity: see every Ambrosia game here.

Questions people ask

Is it free?

It is shareware — freely distributed, fully playable, with a registration notice at startup. The copy here is unregistered and unmodified.

Is this Qix?

It is Ambrosia's version of that idea: claim territory by drawing lines while hazards try to hit the line before you finish it. Qix came first; Barrack is the Macintosh one.

How do I draw a line?

Move off the edge into open board. The line follows you and stays vulnerable until you reach safety again.

Why do I keep dying?

Almost certainly because you took a long line across open board. Nibble at the edges, and save the big claim for when the hazards are far away.

Are high scores kept?

Inside the emulated Mac, in your own browser. They survive closing the tab but not clearing site data.

Why does it take a while to start?

It boots Mac OS 8.6 first. That image is shared with the other titles of this era, so the next one starts faster.

Put Barrack on your own site

Free, no permission needed and no account. Paste this where you want the machine to appear; it brings its own emulator and asks nothing of your page.

<iframe src="https://macemu.com/embed/barrack/"
        width="800" height="600"
        style="border:0;max-width:100%"
        allowfullscreen
        title="Barrack"></iframe>
<p><a href="https://macemu.com/run/barrack/">Play Barrack</a> free on macemu</p>

Sized to this title's real screen. How embedding works.