Mark was also the main input into the Creatures Developer Network, and provided assistance and knowledge about the arcane language called CAOS. He was a member of the Creatures Community on Active Worlds, being known there as Cobbler. Mark was producer for Docking Station, Creatures PS1 and Creatures GBA, handled manuals and extra sound effects (including the infamous DJ_G track). Mark wrote the original Docking Station Story and took it in turns with Ashley Harman to write the individual stories that accompanied the breed packs. Mark's favourite saying was: Peace and Carrots!