Celeste 64Archipelago randomizer mod

Playing with others

One solo adventure per Archipelago slot, exchanging items in simultaneous or asynchronous sessions. Ghosts show other Celeste 64 participants, but do not turn separate progression into a shared co-op save. Keep each active play session connected to its own intended slot.

Known scope and limitations

• Download the dedicated 1.4.1 Windows game and the celeste64.apworld attached to that release. The included world's manifest declares 1.4.0 and requires Archipelago 0.6.6 or newer; client and world labels are not identical. Client 1.4.1 also explicitly supports 1.3.x seeds.
• Extract the game into a writable directory. Before launching Celeste64.exe, edit AP.json with the room address, exact slot name and optional password. Passing the title screen confirms the initial connection. Keep this plaintext connection file private.
• The core guide documents Linux and Steam Deck through Proton using the Windows executable. This is not a native Linux release or an independent Panludia verification of every Proton version. Follow the current Archipelago APWorld installation procedure rather than assuming the old lib/worlds path in the release notes applies to your installation.
• Back up ap_save.json before changing rooms or versions. The reviewed client loads a single save from its user data directory and stores progress by level, not by room seed. Do not reuse that progress for a new seed merely by editing AP.json, and do not assume a second extracted game folder provides a separate save.
• Play connected and verify checks on the room tracker before closing. The client reconciles saved locations and received items, but this review does not establish durable delivery of every check made during a disconnection. Separate sessions are supported by keeping the same room and slot available, not by treating the game as fully offline.
• Panludia inspected the published APWorld, Windows archive and selected tagged source paths without executing the game. The source save writer validates a backup before replacing the main file; this does not prove room isolation or guarantee recovery from every interruption. No completed playthrough or binary safety certification is claimed.