Quoted from DanQverymuch:
In last night's new episode of "It's Always Sunny In Philadelphia" (Season 12, episode 4), there were two games visible in a mirror. One was a BK2K with replacement backglass art saying "Knight's Lair." A decal, probably, since most of the art was standard, just the middle was covered, and although the game was on the bg was unlit. The other had only the left edge visible and I could not identify it, but someone might recognize it.
Had meant to re-watch today to try to figure out what that was. Didn't look familiar at all watching once through. Makes sense why now.