A reverse isekai would be something like<em>The Devil is a Part-Timer</em>, where our characters would be sent to and/or trapped on modern day Earth for some reason.  Isekai is Japanese for 'another world', and we haven't actually been sent to another world, so ultimately this campaign doesn't really count as an isekai story.  I think my brain mostly made the association because it's a staple of the genre that isekai protagonists tend to gain some sort of absurd power that they then cleverly exploit the mechanics of to cheat their way past various obstacles in the story, and some of the suggestions made for making use of the mirror seemed like the sort of thing you'd see an isekai protagonist do.<br/><br/>Come to think of it, the extra powers characters in the Legendary Monsters game got as they progressed through their stories kind of fit the bill for that, as well.  And now I'm stuck wondering how a D&D isekai story might go...