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?

Arcade Game Zone (NSW) : Everything Else

SMU Guildhall

Every Twilight movie ranked from best to worst

I hit all the legendaries 3 star in a ranked game :D : r

Why the current ranked system is terrible (5 wins+1 loss = derank

Solved A sample of 65 video game satisfaction ratings are

Gameplay Grading - TV Tropes

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

Why did he tk me on purpose in ranked? : r/Rainbow6