Abandonware DOS title

The most popular Engine: Z-machine games

The Z-machine was developed by Infocom and used in its interactive fiction games. Z-machine is a virtual machine that allows a developer to easily develop text-adventures for multiple platforms without much hassle. A number of interpreters exists so you can play both old and new text adventures on dead platforms as well as recent ones: Glulx, Inform, TADS, etc.
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The Witness

DOS1983 Infocom
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Border Zone

DOS1987 Infocom
Welcome to Border Zone (1987, DOS), where the Cold War is hot and your only weapon is your brain (and maybe a good map). This text-based espionage thriller from Infocom combines spy drama with multiple protagonists and a real-time...
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Cutthroats

DOS1984 Infocom
In Cutthroats, you’re a diver hired for a treasure-hunting expedition that’s about to go very wrong. This text adventure from Infocom mixes underwater exploration with a noir-tinged plot full of betrayal and greed. The...
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Varicella

DOSWindows XP/98/95Linux1999freeware