http://callofduty.wikia.com/wiki/Infinity_Ward
Two former employees of Infinity Ward, Jason West and Vince Zampella were locked up in a lawsuit with Activisionover unsettled royalties, which they did not receive for the sales of Call of Duty: Modern Warfare 2. Activision is also suing West and Zampella along with Electronic Arts for $400 million, for certain conspiracies which aimed to detriment Modern Warfare 2. West and Zampella are accused of helping EA with the development of rival game Battlefield: Bad Company 2, which would be a breach of their contracts with Activision. Recently, West and Zampella have added fraud charges against Activision in their counter lawsuit. As of June 2012, Activision settled all lawsuits involving former IW developers including West & Zampella.
Several other articles can prove this as well how they were not being paid or treated well and once activision saw big money they did not want to share any rights or money. The two former employees won the court case and an undisclosed amount of money.
