ZZT is an ancient game creation system for DOS written by Tim Sweeney. To play ZZT games, you'll need to download ZZT 3.2. You'll probably also need a DOS emulator to run ZZT. Try DOSBox.

A space action adventure game for ZZT

A space action adventure game for ZZT

A powerful editor for ZZT worlds

A collection of ZZT and MegaZeux utilities for DOS

A time-travel action adventure game for ZZT

A tool to unlock ZZT worlds