Unreal Software is a small and independent game and software developer created by Peter "DarkCorner" Schauß. Most of these projects are games. The greatest successes of Unreal Software are Stranded, Stranded II and Counter-Strike 2D. DarkCorner uses this name to publish his hobby projects.
The name Unreal Software has actually no distinctive meaning but therefore allows a lot of interpretation. However it is definitively not related with the "Unreal" games and engines by Epic Games.
The first logo had some basic letters and no relevant details. The second one used now the signature "U'" and clearer letters. Finally, the third one, currently used, is now light green.