You're right, that was the standard VGA resolution, and probably used in the majority of games of the era. What I'm remembering was apparently known as Mode X,

You're right, that was the standard VGA resolution, and probably used in the majority of games of the era. What I'm remembering was apparently known as Mode X, which some games used for a square-pixel 320 x 240: https://en.wikipedia.org/wiki/Mode_X https://en.wikipedia.org/wiki/Mode_X