Thanks to the magic of Emscripten, there is now a pure HTML/Javascript version which in theory should run locally on your machine in any robust modern browser. It works fine in up to date Firefox, MS Edge, Safari and Chrome (including tablets, though on smaller ones virtual keyboard may take too much screen space), but note that some ad- and popup-blockers take dislike to it for some reason. You can either kick it off straight away via cloak.html (806.3 KB) and then save the page at any stage, or you can download the zipped version cloakh.zip (178.0 KB), unzip it and point your browser at the resulting cloak.html file.

A unified Linux console/browser build cloak.tgz (196.5 KB) with command editing, defaulting to browser-based display (but if you are using Firefox or Chrome, you may prefer the much simpler HTML/Javascript version).

Mac OS X (10.4 upwards) Intel only Cloak.dmg (438.0 KB) browser and console versions as separate apps.
PowerPC Macs can use a less fancy package of universal build Cloakppc.dmg (86.5 KB) – sorry, I cannot build PPC executables any more.

On Windows 10 you need to use the new MS Edge browser with the HTML/Javascrip version of the game. You can either kick it off straight away via cloak.html (806.3 KB) with command editing, and then save the page at any stage, or you can download the zipped version cloakh.zip (178.0 KB), unzip it and point your browser at the resulting cloak.html file.

Windows installer cloakw.exe (729.9 KB) for an executable capable of browser or console display – the display choice is offered as a part of the installation process.

Zipped windows-unaware MSDOS executable cloak.zip (111.8 KB) with no command line editing. For use only on true DOS machines or under DOS emulators (e.g. DOSBOX).