Includes separate setting for supersampling from normal anti-aliasing options, allowing it to be used in addition to other anti-aliasing instead of solely.
The first video game about Supersampling was released on November 3, 2014.
Effectively this tries to improve visual quality by rendering everything (including other anti-aliasing and screen effects) at higher resolution than the display device can and then downsampling to actual display resolution, hopefully improving image quality beyond what plain super-sampled anti-aliasing could and makes the performance impact optional while being able to use less resource heavy anti-aliasing separately. Essentially a form of future proofing.
See also: SSAA