Mouse Stampede — there are a great many mice and they keep coming Runs here
1985 · Mark of the Unicorn · System 6 · Mini vMac (Mac Plus) · 512×342 black and white
Guide updated September 2026
The screen fills with mice. You deal with them, more arrive, the score goes up, and eventually there are more mice than you can deal with. That is the entire game and it is played with the mouse, which was the joke in 1985 and is still faintly pleasing.
It is a pure arcade score-chaser of the sort the Macintosh got very few of, because the machine was sold as a serious tool and most of its early software behaved accordingly.
Boots straight into a game in progress. The score is at the top; the mice are everywhere else.
Controls
| Mouse | Move and act — the whole game |
| Menus | New game, difficulty and sound |
Mark of the Unicorn still exists as MOTU, a music-hardware company, but abandoned its early Macintosh games line decades ago. Nothing containing this program has been sold since.
Archives
- Internet Archive — the Macintosh floppy this copy was made from.
How it works & what to expect
| Machine | Macintosh Plus, 512×342, black and white |
|---|---|
| System | The floppy's own — this disk carries the System it shipped with |
| Emulator | Mini vMac, compiled to WebAssembly |
| Version | 1.00 |
| Saves | High scores persist inside the emulated Mac |
There is no story, no levels in the modern sense, and no ending. The difficulty is the arrival rate and the win condition is a bigger number than last time.
It runs at the speed a 68000 draws that many sprites, which is part of the texture. As the screen fills, everything slows slightly, which acts as its own mercy.
Why it is remembered
Mark of the Unicorn made games first. MOTU is now a music-hardware company of long standing; in 1984 and 1985 it published Macintosh games and a word processor. Almost nobody remembers this, and Mouse Stampede is the evidence.
Early Macintosh arcade games are scarce. The machine's first two years produced far more spreadsheets than shooters, and the handful of genuine arcade titles from that window are disproportionately interesting for what they say about who was willing to try.
It uses the mouse well. Direct positional control, no keyboard at all — the sort of thing that was obvious on a Macintosh and awkward on everything else at the time.
Getting started
Click New Game and play a round without trying to be good at it. The rules become clear faster by doing than by working them out.
Work the edges of the screen. Mice cluster in the middle, and the space around the outside is where you can move without losing track of the pointer.
Stop when the screen is genuinely full. There is no way back from a board that is entirely mice, and the score you have is the score you keep.
Questions people ask
Is there an ending?
No. It is a score-chaser: the mice keep arriving and eventually there are too many.
Do I need the keyboard?
No. It is played entirely with the mouse.
Do high scores persist?
Yes, inside the emulated Macintosh in your browser.
Is it in colour?
No. It is from 1985 and the Macintosh was black and white.
Who made it?
Mark of the Unicorn, now known as MOTU and best known for music hardware and software.
Why does it not show a desktop?
The floppy names the game as its startup program rather than the Finder.
Put Mouse Stampede 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/mouse-stampede/"
width="512" height="342"
style="border:0;max-width:100%"
allowfullscreen
title="Mouse Stampede"></iframe>Sized to this title's real screen. How embedding works.
