MGO may refer to:
Science and technology Magnesium oxide (chemical formula MgO) Methylglyoxal, an organic compound Marine gas oil, a fuel oil
Other uses
Master-General of the Ordnance, British military position before 1855 Metal Gear Online or MGO, a series of online modes throughout the Metal Gear series Metal Gear Online 1, the online mode for Metal Gear Solid 3: Subsistence Metal Gear Online Portable Ops, the first expansion of the mode in Metal Gear Solid: Portable Ops Metal Gear Online Portable Ops Plus, the second expansion for the mode in Metal Gear Portable Ops Plus Metal Gear Online 2, the online mode for Metal Gear Solid 4: Guns of the Patriots and later as Metal Gear Online Metal Gear Online Peace Walker, the online mode for Metal Gear Solid: Peace Walker Metal Gear Online 3, the online mode for Metal Gear Solid V: The Phantom Pain
eo:MGO