PlayStation Mobile is fairly open at least: https://psm.playstation.net/portal/en/index.html#register https://psm.playstation.net/portal/en/index.html#register

PlayStation Mobile is fairly open at least: https://psm.playstation.net/portal/en/index.html#register https://psm.playstation.net/portal/en/index.html#register Console dev used to take special, expensive development kits, although moving to a more PC like architecture will make a public SDK at an affordable price more likely. Probably the easiest way to do it right now is to just use the multi-platform Unity engine.