Legend, Anniversary, and Underworld were my most wanted BC games for Xbox One for years! We got Underworld on Xbox One a while back. I own it physically but I bought it again, digitally. Then, at the beginning of the second level, the game glitched and I never played it again.
I got 100% in Legend back in the day. Then, they released Anniversary as DLC and as a stand-alone game. I bought the game. As a result, my perfect score was now garbage.
I beat Anniversary on PS2, and again for Xbox 360. Great game.
I've purchased every one of them multiple times since Legend. Every made a thread cataloging it, a few years ago.
Legend: Physical on PS2, Physical on Xbox 360, digital on PSP, digital on Xbox One
Anniversary: Physical on PS2, Physical on Xbox 360, digital on Xbox One
Underworld: Physical on Xbox 360, Physical on Xbox 360 (the first disc guy scratched) digital on Xbox One
2013: Xbox 360 physically, PS4 Physically, PS4 Digitally (PS+ I think), PS4 Digitally (really good sale), Xbox One digitally (GWG)
Rise: Xbox One physically, PS4 Pro Digitally, XBO X digitally (really good sale).
Shadow: XBO X digitally--but, unless there's some VR stuff for PS4, I shouldn't every have to buy this one again.
Also bought every single one for PS1 and Angel of Darkness for PS2. Still have them all!