Copper Stars and Star Lockers — All Six Locations and Rewards

There are six Copper Stars and six Star Lockers, and every locker costs one star to open. A star you leave behind means a locker you cannot open, and both numbers run out at the same time.

Two of the stars only appear after a fight or a puzzle is finished and one is gated behind the Chisel, so collect them floor by floor rather than at the end. The floor-by-floor pickup order for everything else is on item locations.

1. Street outside the building (Floor 3) — leave Floor 3 through the blue door to the street and inspect the trash can outside.
2. Door A (Floor 1) — go through Door A and the double glass doors, then check the floor near the chairs.
3. Beside the elevator (Floor 0) — inspect the potted plant on the left side of the elevator.
4. TV puzzle room (after the Copper Seed puzzle) — finish the Copper Seed puzzle, light the room using the televisions, then check the shelf on the right.
5. Room after the cow-skull door boss — defeat the boss behind the cow-skull door and search the drawers on the left before you leave the room.
6. Red figure at the top of the stairs (Floor 1) — needs the Chisel first. See the warning below.

1. Director's Room (Floor 2) — trophy cabinet on the right → Aqua Vitae.
2. Iván's apartment kitchen (Floor 2) — cabinet in the upper-right corner → Lavendoleum.
3. Door B bathroom (Floor 1) — the bathroom with the save point, cabinet on the right → revolver ammunition.
4. Door A projector room, upstairs (Floor 1) — enter through Door A and check the shelf on the right → Lavendoleum.
5. Green-symbol room (Floor 3, Iván's apartment) — the room that was sealed behind the green-symbol door, wardrobe on the left → shotgun shells.
6. Emergency-exit route (Floor 0) — through the glass door, take the emergency exit, up one flight, then through the next door; wall locker with the green symbol → revolver ammunition.

Lockers 3, 5 and 6 hold revolver ammunition and shotgun shells — the only such supplies any current guide names in the game. They are not exclusive to the Stella Plena route: if you are short on ammo for a boss retry, those three cabinets are where the game stocks it. The Aqua Vitae and the two Lavendoleum from lockers 1, 2 and 4 are consumables, so spend them once you know you want them.

On the six star locations and the six locker rewards the two guides agree. They only word star #6 differently: GuideXon says the star "drops from the figure's hand" once you return with the Chisel; NoobFeed says obtain the Chisel, return, and collect the star. Same action and same cost either way — the star cannot be taken on the first pass.

Stella Plena is the rarest achievement on Steam at 2.9% global unlock (2026-10-20), and it wants exactly this set — every star spent on a locker, all six lockers open before the closing deadline above. The full achievement list and the missables that conflict with it are on achievements; the Sanguis beast-form fight that shares the deadline is on Sanguis beast form fight.