/vr/ - Retro Games

>>10757765
They were the names of the box sets, like how NES had the "Deluxe Set" and "Action Set."
There was the Base system, which just came with controllers, the Master system, which was that + the gun, and the Sega Scope 3D set which was the console & controlers + gun + 3D glasses.
There wasn't a clear name for the console itself (I think some games/manuals said "Sega System"?) so I guess that's why that ad text is being overly clear that any games associated with any of those box sets will run.
Later Sega retconned it to "Master System" being the name of the console.