Between the months of December 2012 and September 2015, I don't think a day went by when I didn't think about Metal Gear Solid 5: The Phantom Pain. I've never been that excited for a game before or since. The game was poised to be the most important MGS story ever, bridging the final gap between Big Boss' story and the first time he and Solid Snake faced off in Metal Gear, finally showing when he turned into a bad guy.
It's hard to overstate just how hyped up the fanbase was for Metal Gear Solid 5. The game's trailers were among the best ever made and inspired a ton of discussion and theorycrafting (the big twist was guessed after the first trailer, by the way).
