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Metal Gear Online, the Online feature for Metal Gear Solid 3: Subsistence.
Wanna play Deathmatch, Team Deathmatch, Rescure, Sneaking, or Capture in MGO?
by Durango June 02, 2006
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Short for "Metal Gear Online". MGO was offered for one year after the release of "Metal Gear Solid 3: Substance".

Now, MGO is back in the game "Metal Gear Solid 4: Guns of the Patriots".
Have you played MGO lately?

Yes I have, I came in number one during a Death Match.
by Robert Brunello June 15, 2008
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hey john, we're goin over joe's house for an mgo with farm animals!
by CHINS May 21, 2005
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