Fallout
Fallout 2

Baldur's Gate [Tales of the Swordcoast]
Baldur's Gate 2 - Shadows of Amn [Throne of Bhaal]

The Elder Scrolls III - Morrowind [Tribunal & Bloodmoon]

Knights of the Old Republic
Knights of the Old Republic 2 - The Sith Lords

Planescape: Torment
Icewind Dale

And then there are the older games, but I'm too tired now.
[These] are expansions.