Ok, here comes;Aside the Yarring, which Metal Gear should I start with? I want to play the series in timeline order.
MGS3
MGS: PO*
MGS: PW
MGSV:GZ
MGSV:TPP
MGS
MGS 2: SOL
MGS 4: GOtP
MGR:R*
*=Optional games, not necessary to fully understand the story, you can use them as complements.
I recommend watching walkthroughs of those games instead of buying each one.
Note: always refer to the Metal Gear Wikia for better understanding, you will need it a lot. MGS is complex, very.
I did recently purchase The Twin Snakes, and it's a great game!
Also, I did buy Snake Eater on the 3DS, and even though it has a slower frame rate than the PS2 version, it is still an amazing game.