Gauntlet for the Nintendo DS. I know this is an odd answer, especially as the game never actually came out… and that's probably WHY it inspired me. Long ago myself and Adam Rippon (also at Muteki) worked on a Gauntlet game for the Nintendo DS. It was a labor of love in a lot of ways and we were both genuinely excited how it shaped up. And then for a number of reasons we won't get into (and some we don't even really know) it was canceled by the publisher. And then it was pitched to about a dozen more publishers over the years and some picked it up before then giving up on it. I wasn't part of the business side at all there, just a lowly engineer, so I don't know why it all happened. I just know it was crushing to have this game that you poured so much energy into not ever come out. And we're not talking, “Oh, it was canceled like 30% into development.” The game was finished.
After that Adam left that company, and a few months later I did as well. He went on to work elsewhere, and I started Muteki. Then some years later, stars aligned and he joined and here we were working together again. And now we're in a position to say if we have a game that we've made, and we love it, no one can tell us sorry it's canceled due to some unclear business decisions. Now I'm the guy making the business decisions.