I don't think I got to play anything mature till teen - not that age ratings existed before that.
Back in school there were copies of first Larry going around computer class (before what we called "Great Game Extermination").
Earliest game I had at home to play was Wolfenstein 3D.
Don't think I actually bought(/had parents buy me) anything really mature before I was adult, except Police Quest 3. And if you count Double Dragon for violence.







