I've been broke for a few years now, so I suppose I don't technically have any! Though, I kind of do regret time investment in Spiral Knights and Trove, they were great fun at first but slowly died due to greed. Punishing free players, too many paywalls. That. Spore too, though it didn't technically become a franchise as it was mostly slain before it even hatched... Looked like an entirely different game and was missing so many features. I'm waiting for the day a similar concept is tried again, but without that "intervention" I suppose.