In 1997, they created two overhead adventure action-RPG interquel games set after KQ7 using Epic Megagames' ZZT software, King's Quest ZZT and King's Quest ZZT 2.
Epic Games's ZZT and Super ZZT, as well as the open source clone named MegaZeux uses a very compact variant of MML for the PLAY command, with only one channel for the PC Speaker
Like its predecessor, Super ZZT was essentially a game creation system with a few games packaged with it, which included Lost Forest, Monster Zoo, and Proving Grounds.