uesp:Did You Know: The only game to add any new playable races has been The Elder Scrolls III: Morro
uesp:Did You Know: The only game to add any new playable races has been The Elder Scrolls III: Morrowind? Morrowind would introduce Imperials and Orcs as playable characters, while Altmer, Argonians, Bosmer, Breton, Dunmer, Khajiit, Nords, and Redguards would make regular appearances, with few exceptions, from the very beginning with The Elder Scrolls: Arena. -- source link