Three Film Canisters — How to Open All Three

Three Film Canisters unlock the Devora achievement when all are collected. Each canister is in a different part of the run and feeds a different downstream puzzle.

1. Found in the chest in Iván's Floor 2 office.
2. Use it on the projector in Floor 1's projector room.
3. The playback unlocks the first metal box in the theater, which is needed for the Dinner Plate puzzle chain (Black Tape + Plate with X).

1. Found on the Ivan statue in Iván's childhood room beyond Floor -1, after running through the corridors, breaking the glass windows, and pushing the obelisks.
2. Play it on the projector to open the second metal box, which drops the Cow Skull on the theater floor.

1. Found in the Floor 1 blue-door room — interact with it on the table.
2. Interacting teleports you to the film studio lobby.
3. Return and interact again — you teleport a second time (Sanguis appears in the lobby chair).
4. Talk to Sanguis and exhaust dialog with the SPELL option until the Old Book updates and you receive the Silver Key.
5. After defeating Fumus and getting the red Pentacle Stone, use it on the white Hotel room door with the red symbol, exhaust the dialog with the Julia statue, and use the Bottle With Three Doses on the window to purify it with moonlight.
6. Back in the Cursed Film Canister room, use Purified Water on the canister to cleanse it and obtain the third/final Film Canister.

The Devora achievement requires all three canisters collected in one run. The Pentacle Stone drops from Fumus — see Fumus fight. The Bottle With Three Doses is filled by visiting the three apartment save points — see item locations. The full canister chain sits inside the full walkthrough.