Board Thread:General Discussion/@comment-6512-20150911195557/@comment-6512-20150911205239

Yeah, the difference there Doulomb is that Snake's Revenge and Ghost Babel (and Metal Gear Ac!d) specifically set themselves in their own timeline. Portable Ops sets itself up to be part of the "main" timeline, and then Peace Walker and Guns Of The Patriots reference it, establishing it as part of the main timeline.

Rising I get confused by though. Like, I get why people aren't into Portable Ops being "canon" because it does contradict stuff, but Rising doesn't affect anything by being where it is. It's not like there's some pre-determined post-MGS4 canon that Rising ignores. I do sometimes get the feeling that some people don't want Rising to be canon just because they don't like the game (not saying you do Doulomb, I'm just thinking out loud).