Out There: Ω Edition

Out There: Ω Edition

Out There Questions
1. For the games released on multiple platforms, what are all the differences between them? I know the iOS version of this game lacks "Outtheroid" and "Junkfood" achievements and I don't know if there's any incentive for their requirements, otherwise. I also don't know if the Switch game is a unique game or a version of this one.

2. What age rating might Out There: Oceans of Time get, and why did the Out There Chronicles games get the ratings they did?

3. Is there any permanently missable, promotional, or old save content for any game in the series?