Digital Nightmares

Digital Nightmares was a German group that was, under that name, active between 1996 and 1999. They still have a website with some downloads.

The Members

Michael Haar: had already written his first game in 1993, Mission X, a vertically scrolling shoot 'em up for Atari ST that could run both in hi-res monochrome and on the color screen. He was involved in most productions of the group and later joined NEON Software. In 2005 he moved to 49Games.
Ulrich Haar: later joined Reakktor became technical director for the MMORPG Neocron.
Rebecca Ludolphy: joined a bit later. In 2001 she joined Thomas Kronenberg's company intulo.
Susanne Haar: Was credited for the music in Knuddel's Quest.
Holger Niesel: is occasionally credited for music as well.

The Games

Digital Nightmares created lots of games, and some of them are lost. Here I just pick a few that saw several versions.

Kwiks: A Qix clone originally for the Atari Falcon. It was later ported to Windows and adapted for Lomax as Lovely Girls.
The Knuddel Series: Knuddel is a cuddly (that's what his name means) creature who starred in three games: Knuddel's Quest, Knuddel's Minigolf, and Knuddel's Lights.
DNPCTris: An SVGA Tetris for one or two players. It was later published by Lomax as LomTrixx.
PCTris 3D: A Blockout clone, later published by Lomax as 3D-Lomtris.

Lomax

In 1998, meanwhile defunct online vendor Lomax (famous for Lomax Boulders) published four Windows shareware games by Digital Nightmares that were adapted for this purpose: