Elder millennial, here. One of the weird things about the 90s was cereal boxes marketed to little bastards like me at the time would often have some kind of toy included in it.
PC gaming was kind of in its infancy and growing rapidly in popularity, so eventually the inevitable happed: a cereal company promoted their cereal by shoving a fucking CD into it, that little bastards like me lost their shit over, installed, and played the snot out of.
It was literally just Doom, except reskinned so the demons were boogers, and everything else was a fucking Chex cereal advertisement.
AND IT WAS AMAZING! lol
Best box of cereal my parents ever bought. Not a bargain bin, but I feel like "in a box of cereal" fits the spirit of the question.