Grand Theft Auto San Andreas
Here is a map modification that will open up the garage in San Fierro and will also add an Oil Pit and a ramp. You can also can use the garage to hide from the police.
Here is the Russian Winter Mod, a very interesting modification that will add snow to Mount Chiliad, along with the island that this mountain is located on including Whetstone, Shady Creeks and Angel Pink.
Here is a map modification that will add Graffitied to the Streets within GTA San Andreas.
Here is the Ganstars Paradise, a map modification that will add a huge city over Bone Country. This city includes a food stores, a gym, stunt ramps, lots of explosives and many other things spread all over the city.
Here is a map modification that will add new textures to a garage and also a wooden building new to it.
Here is the Revolution Airport, a detailed and well made replacement for the disused airport in Verdant Meadows.