Now you're just making stuff up in order to dodge the argument. There's absolutely nothing saying "we're only listing the games written by Kojima".It's a Kojima-sanctioned timeline he wrote everything for. Of course it's a Kojima timeline.
There's a list of Metal Gear games, they talk of a "『メタルギア』シリーズ正史" (which could be translated into something like "Metal Gear series official timeline", indeed), and Metal Gear Solid Portable Ops is skipped over entirely (in release order, Metal Gear Solid 3 Snake Eater is said to be the 5th game belonging in that timeline, Metal Gear Solid 4 Guns of the Patriots the 6th, and Metal Gear Solid Peace Walker the 7th).