Jacob McMahon - is a video game producer. Jacob McMahon began his career in 2002 and has worked for companies such as Gas Powered Games, Microsoft Studios and Destineer. Jacob McMahon's first game was Dungeon Siege which was released 22 years ago. Best Game Jacob McMahon contributed to was Dungeon Siege. Jacob McMahon's latest work is Dungeon Siege which was released 22 years ago.