it would have to be a fairly atypical sort of game I imagine, most games with a premade tutorial world are not going to have anything too extreme in that world to find, unless its some sort of hidden easter egg. I could see it if its a game that uses procedural generation, but those kinds of games usually dont have much of a tutorial beyond maybe some short instructions.

I guess it could kinda apply in a very mild sort of way in GTAOnline, if you happen to be at the point in the very beginning where youre getting your first car and get free insurance on it, and happen to find one of the pre-customized npc cars that spawn rarely and are still cheap enough to keep after stealing, but those arent really all that rare or special.