@Dr_Obvious@secretmousealias@actuallyautistic I think there are two options from here that would work. There's the short summary ("oh it's an RPG on mobile, it's got really smooth gameplay that makes it really addictive" - note I made this up, I don't actually know the game!), or there's the changing the topic back to the other person ("Actually I was thinking of trying that, what's it like?")
Best tactic depends on whether you feel like talking or listening.