In the same solar system, here is a list of game engine recreations, most of which are open: https://en.m.wikipedia.org/wiki/List_of_game_engine_recreations
In the same solar system, here is a list of game engine recreations, most of which are open: https://en.m.wikipedia.org/wiki/List_of_game_engine_recreations
Proton all the way. E-mail, calendar, contacts, Proton Drive, and VPN if you want it. You can use a custom domain for your e-mail address, as well. Photos are another story, though.