It’s just what it was called in the nineties.

I tell them to start their Nextcloud client. Or if they don’t have it, give them the share link.

Spelunky, for co-op. I definitely prefer the first game for solo but it only has local co-op. Spelunky 2 has both local and network play but the difference between having a single camera follow the one flag carrier and everybody having their own screens is like playing a different game. Single screen is total mayhem.