There are the D&D based RPGS : NWN, Baldur's Gate, Torment, Icewind Dale, KotOR.
And the rest : Wizardry, Diablo, Elder Scrolls, Might & Magic, Ultima.
*Fallout is in between imo*
Why can't we all just get along? They're just games, made to allow us to WASTE TIME. Jeez!