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4 months agoFrom the top of my head I can think two:
- Battle block theater is a platformer puzzle game and really fun to play in local coop, and it runs on almost anything.
- Sonic All stars racing is a really fun Mario kart like racing game with local multiplayer.
Not sure about Linux support though, so check it out first, but both are relatively old titles so I think they have a good chance to run.

I still think it should be the other way around. It should be a setting on the device/OS that an adult could tik and lock with a password or something that would mark the user or the device as a minor.
It would be an easy thing for a parent to do and to everyone implement, and I doubt anyone would get angry over that.