Rolf Jansson

Began building Wurm Online with Markus Persson around 2002 — the pair incorporated as Mojang Specifications AB in 2007, a name Persson took with him when he left to eventually create Minecraft. Jansson stayed, leading Wurm from its 2003 beta through official release in 2012 and remaining CEO of Code Club AB through its 2019 acquisition by Game Chest Group.