Psytronik Software are a software label devoted to releasing new games for classic computer systems.
Psytronik Software is a british software publisher started in 1993. The company publish new games for retro gaming platforms; Commodore 64, Amstrad CPC, Commodore 16, Commodore Plus/4, VIC 20. But also some titles for Windows. Among the games are: Mayhem in Monsterland and Knight 'n' Grail.
Source: Wikipedia, "Psytronik Software", available under the CC-BY-SA License.