Entertainment Software Rating Board

The Entertainment Software Rating Board (ESRB) is a North American non-profit organization that assigns age and content ratings for video games and mobile applications created in 1994.

Trivia

 * Adults Only 18+ (not counting Rating Pending) is only rating that doesn't have any Sega game.
 * Shadow the Hedgehog was originally going to be rated Teen, with the game containing red blood, violent scenes, and more instances of cursing, but later it was changed to Everyone 10+ rating.