Metal Gear 20 Years History ~Past, Present, Future~ is the first track on the Metal Gear 20th Anniversary Music Collection and is a re-orchestrated medley of a variety of songs from the Metal Gear series. The piece's composition was supervised by Norihiko Hibino and Takahide Ayuzawa.
The tracks featured (in order) are:
- 00:00 - 01:30 - "Theme of Tara" (Metal Gear)
- 01:30 - 02:18 - "(!) Red Alert" (Metal Gear)
- 02:18 - 02:39 - "Level 3 Warning" (Metal Gear 2: Solid Snake)
- 02:39 - 04:18 - "Level 1 Warning" (Metal Gear 2: Solid Snake)
- 04:18 - 05:41 - "Cavern" (Metal Gear Solid)
- 05:41 - 06:28 - "Encounter" (Metal Gear Solid)
- 06:28 - 08:07 - "Olga's Battle Music" (Metal Gear Solid 2: Sons of Liberty).
- 08:07 - 09:42 - "On the Ground ~ Battle in the Jungle" (Metal Gear Solid 3: Snake Eater)
- 09:42 - 11:43 - "Escape Through the Woods" (Metal Gear Solid 3: Snake Eater)
- 11:43 - 14:25 - Gene (Metal Gear Solid: Portable Ops)
This track also features in Metal Gear Solid 4: Guns of the Patriots on the iPod, split into four parts. Parts 1 and 4 were unlocked from the games start, where as Parts 2 and 3 needed to be found in the game.
This song is also featured on the Walkman in Metal Gear Solid: Peace Walker and just like in Metal Gear Solid 4, it's split in four parts. First one is available from the beginning and the further ones are unlocked as the player levels up the Walkman.
- ^ This song is not officially titled, as it was not released on any soundtrack. However it does appear during the medley track "Tanker Incident" in Metal Gear Solid 2: Sons of Liberty Soundtrack 2: The Other Side.