The Metal Gear classics on GOG are looking exactly like they did when they first released. (Which is great, if that’s what you want?)
Additionally, GOG sees the launch of the Konami Collector’s Series, which packs in Castlevania, Castlevania II: Simon’s Quest, Castlevania III: Dracula’s Curse, Contra and Super C.
The releases of Metal Gear games are as complicated as its timeline, so I’ll happily bow down to experts on this. The two Metal Gear Solid releases are early 2000s ports that might require some fan patch TLC.
It’s also not the best shape you’ll have ever seen the games. As The Verge recommends, if you’re looking for better-looking versions, Metal Gear Solid: The Twin Snakes is a remake of Metal Gear Solid that was made for the Nintendo GameCube in early 2004. Metal Gear Solid 2: Substance is actually an updated version of Metal Gear Solid 2: Sons of Liberty, but only Sons of Liberty saw HD updates on the Xbox 360 and PS3.
(And if you’re looking for a primer on what makes Metal Gear Solid 2 so flipping cool, you could do a lot worse than this piece from the Cut Scenes archives, comparing its cinematography to The Terminator.)
Provided you can stomach their raw visuals and a fan patch or two, then, these will be some popular releases.
Who knows? Maybe this paves the road to some Silent Hill digital re-issues.