Back in 1981, this was part of the original set of software available for the IBM PC on launch.  As it turns out, its roots go even earlier than that - and there's also the easily-bypassed copy protection, and a mysterious check for a BASIC error code that isn't documented anywhere.

The lowdown on why this game can be so frustrating to play with the keyboard - in the wrong circumstances.

Mapping out all four levels and 127 rooms of this maze shooter - specifically, the IBM PC version.  As proof of cartographic accuracy, you also get a playthrough video.

An exercise in taking "modern" graphics software and dragging it kicking and screaming back to the glorious days of clean, simple, 2 bits per pixel raster graphics.  Plus a time-lapse video of the whole process.

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