WorldSync

In co-op survival games like Valheim, Palworld, V Rising and Enshrouded, the world lives on the host's PC. If that person is offline, nobody else can play it. WorldSync keeps the world in a cloud folder the group already shares (Google Drive, Dropbox or OneDrive), so whoever presses Play gets the newest save and hosts, and their progress goes back to the group when they quit.

It finds each game's save folder and lists the worlds by when they were last played, uses invite codes so friends can join by pasting one code, shows who is playing right now, and backs up every save before it is overwritten, with conflict warnings in both directions. Each game has its own look and a step-by-step setup guide.

Supported games: RuneScape: Dragonwilds, Valheim, Enshrouded, Palworld, Core Keeper, Sons of the Forest, V Rising, Grounded, Raft and 7 Days to Die. Free and open source (MIT), no account, no server.

Privacy: the GitHub download sends anonymous usage reports by default (which game, whether a sync worked; never names, world names or file paths). One checkbox in Settings turns them off.