Z and Z Expansion Kit includes a native Windows 95 port of the DOS Game Z and the Z Expansion Kit, which was never released separately. The game runs only in native Windows 95 mode.
The expansion kit adds a multi-player editor and a Z Theme Pack. Furthermore, the control interface has been optimized, and tweaks were made to the single- and multiplayer gameplay. A few changes to the placement of the guns in the game were made as well.
The Z Expansion Kit also adds 11 levels (from 20 to 31), replicas of the first 11 levels of the original DOS release, but with a larger map and all of the units available right away.