With Vengeance you can choose the original route. As in the original game.
Or you can choose the new route that goes in a completely different direction. Fixes the story (as in, actually adding a deep story), pacing, new area, ect. Basically what the game should have been if they didn't run out of time.
The director outright states he pushed for this new version because he wasn't satified with the original
The origin of stealth action returns. METAL GEAR SOLID: MASTER COLLECTION Vol. 1 unifies the beginning of the METAL GEAR gameplay experience in one single package.
Infiltrate enemy fortresses all over the globe, complete your missions with stealth and experience the thrilling cinematic story of the METAL GEAR series.
Volume 1 line-up features the original titles and beginning of the METAL GEAR series: Metal Gear, Metal Gear 2: Solid Snake, Metal Gear Solid (Including VR Missions/Special Missions), Metal Gear Solid 2: Sons of Liberty (HD Collection version), Metal Gear Solid 3: Snake Eater (HD Collection version), and much more bonus content! This collection includes the classic versions of the games, complete with minimal edits to copyrighted contents. Regional versions of the titles are available as additional downloads.
Bonus content includes the first title in the METAL GEAR series, a Screenplay Book containing in-game text of each title and a Master Book detailing the story and characters. Also included in the bonus content of the METAL GEAR SOLID: MASTER COLLECTION Vol. 1 will be two digital graphic novels created by award-winning illustrator Ashley Wood. The Metal Gear Solid: Digital Graphic Novel is a fully voiced, digital comic depicting the events of Metal Gear Solid through beautifully dynamic animated panels, followed by Metal Gear Solid 2: Digital Graphic Novel that expands on the events of the sequel
Metal Gear 2: Solid Snake
Metal Gear Solid (Including VR Missions/Special Missions)
Metal Gear Solid 2: Sons of Liberty (HD Collection version)
Metal Gear Solid 3: Snake Eater (HD Collection version)
Metal Gear (NES/FC version)
Metal Gear Solid: Digital Graphic Novel
Metal Gear Solid 2: Digital Graphic Novel
Metal Gear Solid: Screenplay Book o Metal Gear Solid: Master Book
Metal Gear Solid 2: Screenplay Book o Metal Gear Solid 2: Master Book