Why Does S Come Before A in Video Game Rankings?

D, C, B, A, S? Tier rankings have achieved mainstream meme status, but when did S come to signify the highest possible rank?

How would I calculate a players individual game performance

There's something above an A or even an A+? - The history of the S

Ranking System (Concept) - Giant Bomb

How ranked be nowadays smh : r/apexlegends

LEGO Pirates of the Caribbean - Every Character Ranked PART 4

Video Game Movies Ranked : r/Letterboxd

Why is 'S' a higher rank than 'A' in video games, etc.? - Quora

SMU Guildhall

Ranking EVERY Xbox Games Studio : Yes Even Those Studios

Scarface: The World Is Yours - Xbox : Artist Not

Fortnite Ranked Play is Coming to Battle Royale and Zero Build!