- Released 1987, MSX, NES (non-canon version)
- 🟢 1st entry of the mainline series
- 5th part chronologically
- The NES port has some changes to the MSX version, like replacing the Metal Gear boss fight with a boss fight against a super computer

- Released 1990, MSX
- 🟢 2nd entry of the mainline series
- 6th part chronologically

- Released 1990, NES
- 🟠 Non-canon entry
- Sequel of the NES port of Metal Gear, which inspired Hideo Kojima to make an actual sequel to his MSX original version of Metal Gear

- Released 1998, PS1, PC
- 🟢 3rd entry of the mainline series
- 7th part chronologically

- Released 1999 in Japan for PS1, 2000 in NA and EU for PC
- 🟡 Expanded edition of Metal Gear Solid with additional features
- Some of those features were already included in the NA and EU release of Metal Gear Solid

- Released 1999, PS1
- 🔵 Add-on of Metal Gear Solid, including hundreds of VR missions
- Originally released as part of Metal Gear Solid: Integral in Japan, it was later released as a single add-on and required Metal Gear Solid to play

- Released 2000, Game Boy Color
- 🟠 Non-canon entry

- Released 2001, PS2
- 🟢 4th entry of the mainline series
- 8th part chronologically

- Released 2002, XBox, PS2
- 🟡 Re-release with additional content

- Released 2004, Gamecube
- 🟡 Remake of Metal Gear Solid with gameplay elements of Metal Gear Solid 2

- Released 2004, PS2
- 🟢 5th entry of the mainline series
- 1st part chronologically

- Released 2004, PSP
- 🟠 Non-canon entry

- Released 2005, PS2
- 🟡 Re-release with additional content, also including Metal Gear (MSX version) and Metal Gear 2: Solid Snake

- Released 2005, PSP
- 🟠 Non-canon entry

- Released 2006, PSP
- 🟠 Non-canon entry
- Portal Ops being canon is controversial, as the game was considered canon at release, however it was made non-canon with the release of Peace Walker

- Released 2006, PSP
- 🟡 Retelling of Metal Gear Solid
- Adaptation of the Metal Gear Solid comics released in 2004/2005

- Released 2007, PSP
- 🔵 Stand-alone expansion of Portable Ops

- Released 2008, Mobile
- 🟠 Non-canon entry

- Released 2008, PS3
- 🟢 6th entry of the mainline series
- 9th and so far last part chronologically

- Released 2008, PS3
- 🔵 Multiplayer entry released with Metal Gear Solid 4: Guns of the Patriots

- Released 2010, PSP
- 🟢 7th entry of the mainline series
- 2nd part chronologically

- Released 2011, PS3, Xbox 360
- 🟡 HD Collection of Metal Gear Solid 2: Substance, Metal Gear Solid 3: Subsistance (which also includes Metal Gear and Metal Gear 2: Solid Snake) and Metal Gear Solid: Peace Walker

- Released 2012, 3DS
- 🟡 Re-release with exclusive 3DS features

- Released 2013, PS3
- 🟡 Same content as Metal Gear Solid HD Collection, also including Metal Gear Solid 4: Guns of the Patriots, both Digital Graphic Novels and a download code for Metal Gear Solid and Metal Gear Solid: VR Missions

- Released 2013, PS3, Xbox 360
- 🟠 Non-canon entry

- Released 2013, PS3, Xbox 360, non-physical
- 🔵 1st DLC episode

- Released 2013, PS3, Xbox 360, non-physical
- 🔵 2nd DLC episode

- Released 2014, PS3, Xbox 360, PS4, XBox One, PC
- 🟢 8th entry of the mainline series
- 3rd part chronologically

- Released 2015, PS3, Xbox 360, PS4, XBox One, PC
- 🟢 9th entry of the mainline series
- 4th part chronologically

- Released 2016, PS4, XBox One, PC
- 🟡 Re-release of Metal Gear Solid V: Ground Zeroes and Metal Gear Solid V: The Phantom Pain with all DLC

- Released 2018, PS4, XBox One, PC
- 🟠 Non-canon entry

- Released 2023
- 🟡 Collection of Metal Gear (MSX & NES version), Snake's Revenge, Metal Gear 2, Metal Gear Solid: Integral (incl. VR Missions), Metal Gear Solid 2 and Metal Gear Solid 3 (both versions from HD collection) and both digital graphic novels

- Released 2025
- 🟡 Remake of Metal Gear Solid 3: Snake Eater