1.0 on 15 September 2026: platforms, the crossplay option Jagex added to dedicated servers, invite codes, and what the 1.0.0.4 and 1.0.0.5 patch notes mean for anyone running a server.
One .sav file and a rule about its name: the Windows save path, the server’s Savegames folder, why you must not rename the file, and why world rules travel in the save rather than the INI.
Where the Player ID is, what putting it in Owner ID unlocks, what an admin can and cannot do, why there is no whitelist, and the community disagreement over Player ID versus EOS ID.
Jagex’s rule is 2 GB plus 1 GB per player, which puts a full six-player server at 8 GB. What the formula covers, what it leaves out, and the measurements we will publish once we have them.
A running server that nobody can find: check the build mismatch and the wrong-case world name first. The checklist: version in the log vs the game, exact-name search, restart after a patch, INI reset, and the Steam-invite known issue.
SteamCMD app 4019830, the five DedicatedServer.ini fields, UDP 7777, and the version-matching rule that makes servers vanish after every patch — the full setup on Linux and Windows, from Jagex’s guide and the 1.0 notes.