Board Thread:General Discussion/@comment-6747658-20130425222741/@comment-1672596-20130501031316

Zelda4dinner wrote: Okay then, betrayed them to who? Even if XOF is affiliated with the Patriots, like I said, something has to happen to keep them from knowing Big Boss is behind Outer Heaven and to make them not stop him from returning to Foxhound.

Basically, "traitor" as in "her status as an agent had been compromised." Basically, Zero grew suspicious of her due to her attempt at delaying her mission with Cipher to celebrate Peace Day, and her attempting to lie to him regarding the status of the modifications. When she found out, she tried to sabotage ZEKE, then Chico stumbled on it, and you know the rest. You can glean this from both the Ground Zeroes demo and the Paz diaries in Peace Walker.

As far as your statement about XOF, even if XOF is taken down, that still wouldn't have kept Big Boss in hiding for long. Don't forget, Paz indicated that the Patriots had control over the NSA, NRO, DIA, and CSS. We obviously know how Cipher at the very least manipulated the CIA and KGB, if not was in direct control of them anyways, more than that, there's also the United Nations that's in control. Even Big Boss mentioned that the entire world is on their tail in the ending of Peace Walker.