I went on a Prope hunt, because I hadn't been paying attention. And it's true, they didn't make any Sega games after 2009, but they were doing things in the mobile space right up to 2017. It's just a lot of it was Japanese only and nobody seemed to notice. My pick: "Wii Motion Plus Variety", aka Wii Play: Motion, 2011 sequel to Wii Play. Prope did one of the minigames (and know who else did some of the others? Arzest, aka Naoto Oshima's crew). So that's Naka and Oshima (kinda) working together on a Nintendo game of all things. The more you know. My understanding is Sega contributed 10% of the initial 10,000,000 yen capital with first right of refusal on publishing. It's an idea Sega had, where they'd pay a bit of money to fund smaller studios - I have no idea if they signed deals with any others, but the 20% comes from the maximum amount Sega were willing to fund should others come forward. With Prope it was only 10%. I can only assume Sega made its money back and stopped caring, because Prope released tons of titles without Sega (including two Digimon games... so not sure how that even works under the above arrangement). I also don't understand why they stopped - did Naka just get bored one day? The site's not dead and there's no reports of money or staffing issues. Weird, man.