SNES games like Final Fantasy 6 can keep players busy for dozens of hours or more.
Not for the debut of the Active Time Battle system, something Square Enix still uses now. And not even because it made fewer ...
FPS games. Platformers. Cronenberg-type games. Basically every genre you can think of had their breakout decade in the 90s. But if there was any genre that really flourished more than Beanie Babies ...