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1.
A term used to describe Bethesda Softwork's Gamebryo video game engine's inability to render character faces in a believable or attractive manner. Games affected are the Morrow wind series and Fallout series.
example:

"Dude that NPC's face is so damn ugly!"

"They all look like that in this game, it's bethesda face"
by OutofSpec September 13, 2013