Downloadable content (DLC) for Metal Gear Solid 4: Guns of the Patriots was made available through the PlayStation Network. The DLC included unique OctoCamo patterns, additional songs and podcast sessions for the in-game iPod, and at least one password.
The Metal Gear Solid 4 Database is listed as an add on for Metal Gear Solid 4 and is considered DLC by Konami. The online part of the game has its own DLC in the form of expansions, equipment and content found only on the Metal Gear Online Shop.
Special OctoCamo patterns are available via DLC. The patterns usually have a varying amount of benefits for camouflage, but generally fall short, instead they offer other special benefits.
|Digital Red||No special effects.|
|Digital Blue||Increases Camo Index when in or near water.|
|Laughing||Embued with, and has any enemy that witnesses the player when wearing it succumb to, Laughter.|
|Raging||Embued with, and has any enemy that witnesses the player when wearing it succumb to, Rage.|
|Crying||Embued with, and has any enemy that witnesses the player when wearing it succumb to, Crying.|
|Screaming||Embued with, and has any enemy that witnesses the player when wearing it succumb to, Screams.|
|Snake||Snakeskin-patterned Octocamo that allows the player to knock down regular enemies in one hit, and relieves stress caused by carrying heavy equipment, back pains, and/or screwups by rolling, but at the cost of 10% of their Camo Index.|
|Beauty||OctoCamo resembling the Beauty and the Beast Unit's jumpsuits that allow the player to absorb psyche when CQC-ing a soldier, but has twice the stress when exposed to sunlight. It was released on August 14, 2008.|
|Metal||Metallic OctoCamo that halves LIFE and PSYCHE loss, but at the cost of 10% of the Camo Index. It was released on August 28, 2008.|
|Gear||Gear OctoCamo: OctoCamo with gear patterns that halves LIFE and PSYCHE and gives a higher Camo Index than normal. It was released on September 11, 2008.|
|Fly||Smelly OctoCamo that has soldiers fainting after attempting to grab the player from the stench, but at the same time increasing the stress level.|
|Haven||Allows for 99% camo index universally when standing still; but at the cost of PSYCHE and LIFE decreasing twice as much as it normally decreases. It was released on October 9, 2008.|
MGS4 Integral Podcast
- Main article: MGS4 Integral Podcasts
- MGS4 Integral Podcast 02
- MGS4 Integral Podcast 03
- MGS4 Integral Podcast 04
- MGS4 Integral Podcast 05
- MGS4 Integral Podcast 06
- MGS4 Integral Podcast 07
- MGS4 Integral Podcast 08
- MGS4 Integral Podcast 09
- MGS4 Integral Podcast 10
- MGS4 Integral Podcast 11
- MGS4 Integral Podcast 12
- MGS4 Integral Podcast 13
Songs for the iPod available via DLC. They add to the iPod's library of songs.
- "Conclusion" (MGS4 Extra):
- "HIND D" (MGS1):
- "Battle of Highland" (MGS4 Extra):
- "Harrier" (MGS2: Digital Graphic Novel):
- "Love Theme ~hum version~" (MGS4 Extra): August 7, 2008.
- "Battle" (MGS2 Plant Chapter): August 21, 2008.
- "Forerunner" (MGS4 Extra): Released on September 4, 2008.
- "The Pain" (MGS3): Released on September 18, 2008.
- "On the Edge" (MGS4 Extra): Released on October 2, 2008.
- "Policenauts Medley" (Policenauts):
- "War Has Changed" (from the TGS 2005 Trailer of MGS4): Released on October 30, 2008.
- "Escape Through the Woods" (MGS3): Released on November 13, 2008.
- "Balance Lost" (MGS4 Extra): Released on November 27, 2008.
- "Mantis' Hymn" (MGS1): Released on December 11, 2008.
- "View of Deep Snow" (Christmas MGS4):
- "Leo! Leo!" (Z.O.E.): Released on January 15, 2009
- "Chair Race" (MGS4 2005): Released on January 29, 2009
- "Enclosure" (MGS4 version): Released on February 26, 2009
- "La Clown" (Metal Gear Ac!d): Released on February 11, 2009
- "Everything Begins" (MGS4): Released on March 26, 2009
- "Arsenal's Guts" (MGS2): Released on March 12, 2009
- "At Dawn" (MGS4): Released on April 23, 2009
- "RAY" (MGS2: Digital Graphic Novel): Released on April 9, 2009
- "Father and Son" (MGS2): Released on May 21, 2009
- "VR Training" (MGS Integral): Released on May 7, 2009
- "Confession" (MGS4): Released on June 4, 2009