I had to google this place based on your description of the size, it sounds nuts!
https://en.wikipedia.org/wiki/Arundel_Mills
Also, from Wiki:
It is the first enclosed mall to feature a Medieval Times dinner theater.[1] In addition to 17 large anchor stores, Arundel Mills also features a Dave & Buster's, Maryland Live! Casino, and an Egyptian-themed 24-screen megaplex theater.
WAT?! Medieval times in a mall!
Yeah, it's pretty big. Not as big as say, Mall of America, I don't think, but I haven't been there yet myself. My lady wants to go to that sometime. I think there's another crazy huge mall in Canada somewhere which is also something we've discussed visiting.
I spent a decent amount of time in the D&B at Arundel Mills, I even tried to work there but I quit after like two weeks of being ticket restock monkey. It was actually a Jillian's before D&B took it over but it was essentially the same games before and after. The D&B in Rockville, MD was way better game wise in my mind - they had a pretty awesome shooting gallery (all physical targets), one of those giant Galaxian 3rd 6 person deals which I am glad I got the chance to play before it got taken apart, and a Quick N' Crash by Namco which I had a lot of good times going back and forth with a friend on trying to beat each other's times.
Never actually been inside of the Medieval Times myself, but I have walked past it a bunch! Nowadays I try to avoid that place like the plague. Parking is a nightmare.