[STEAM] This PDF contains a playable copy of Doom

[Steam 0]

Here at Ars, we're suckers for stories about hackers getting Doom running on everything from

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and

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to

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and

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. Despite all that experience, we were still thrown for a loop by a recent demonstration of

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.

On

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, coder ading2210 discusses how

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Acrobat included some robust support for JavaScript in the PDF file format. That JS coding support—which

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and is

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in

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's official PDF specs—is currently implemented in a more limited, more secure form as part of

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, the built-in PDF-rendering engine of Chromium-based browsers.

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In the past, hackers have used this little-known

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feature to code simple games like

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and

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into PDF documents. But ading220 went further, recompiling

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of

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using an old version of

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that outputs optimized

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code.

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