Gregory MacMartin - is a video game designer. Gregory MacMartin began his career in 2001 and has worked for companies such as Interdimensional Games, Eurocom, KnowWonder, Griptonite, Argonaut, Warthog and Electronic Arts. Gregory MacMartin's first game was Harry Potter and the Sorcerer's Stone which was released 22 years ago. Best Game Gregory MacMartin contributed to was Consortium: The Tower. Gregory MacMartin's latest work is Harry Potter and the Sorcerer's Stone which was released 22 years ago.