I had some arcade shooters for the sega saturn in the late 90s that had a sideways option so it could fill the whole screen. I was still using my old Amiga mon

I had some arcade shooters for the sega saturn in the late 90s that had a sideways option so it could fill the whole screen. I was still using my old Amiga monitor back then and would occasionally turn out on its side. the box was mostly square so it worked and wasn't huge like today's monitors. MAME has definitely had that as an option as well since, well, forever.