According to Hideo Kojima, the two separate teams working on Metal Gear Solid: Peace Walker and Metal Gear Solid: Rising "are not really good friends." In a GamePro exclusive interview with Kojima at GamesCom, the creator of the Metal Gear Solid franchise said the reason they are not good friends is because the Rising team has access to more money and is working with higher-end technology and hardware specs. "That's the one reason why they are not good friends," said Kojima.
Is the Peace Walker PSP team envious of the Rising team? Pretty much. "If you could imagine the PSP team looking at the Rising team," explained Kojima, "they have all the money and specs."