Backrooms: Found Footage Server Hosting

Start with 5 GB. The pack has 47 mods and stays light on the server, because its heavy visual layer of shaders and camcorder effects runs on each player's PC. Extra memory only pays off when your group splits up and pushes into new corridors in many directions at once, forcing the server to generate more rooms in parallel.

Around six is the sweet spot. The horror works best in a small group where people can lose each other and regroup, and six explorers fanning out keep generation load comfortable on 5 GB. Bigger groups can play, but the tension fades once every corridor already has someone in it, and more scattered players means more fresh rooms to build.

Stop the server, back up the world, then install the new build from the Modpacks tab. Ask every player to update their client to the same build before rejoining, since mismatched mods block the login. Rooms you already explored stay exactly as they were generated, so a build that changes level generation only shows up in areas nobody has visited yet.

Yes, as long as anything you add is a Fabric mod made for 1.20.1. Purely visual or client-side mods belong on the players' PCs, not on the server. Be careful removing a mod that adds blocks or entities, because the parts of the Backrooms built from them will vanish or break. Try every change on a copy of the world first.

The standalone Found Footage mod by SpacePotatoee gives you the Backrooms themselves. This pack is that mod plus 46 others picked by onr23 to round out the experience, so you get a tuned, ready setup instead of hunting down dependencies and extras yourself. If you only want the bare levels the mod alone is lighter, but for a group night the pack saves the setup work.

No. The tape grain, lighting and shader work are drawn by each player's graphics card, so the server never processes them. A player with a weak GPU may see low frame rates, but that is a client setting to tune, not a sign the server needs more RAM. Judge server health by its tick rate instead, for example with the spark profiler if you add it.