The Room 4: Old Sins is the final entry in Fireproof Games’ puzzle series, unfolding entirely inside a Victorian dollhouse of Walderrave Manor in 1899. The case notes tell of Edward Lockwood, an engineer dismissed from the Royal Institute, his wife Abigail, and an investigation into the strange null element.
The eyepiece lens reveals hidden things, exposing the null’s signature across the house. Each room of the dollhouse is a puzzle box, and completing its central puzzle yields a strange artifact and collapses that room, weakening the seal around the null.
The puzzle variety is broad, from circuit completion and dial matching to steam-valve routing, a submarine with coordinates, laser reflections and an octopus’s two eyes. Solved puzzles announce themselves clearly, with the satisfying click-and-unlock feedback the series is known for.
The story arrives through books and notes left in the house, charting Edward’s descent as the null consumes him and Abigail’s quiet resistance. Legible handwriting is a genuine relief after Riven, and the couple’s tragedy carries the atmosphere.
The null remains deliberately mysterious, known only to drive people mad and usually to kill them. The final note reframes the protagonist’s own role in the affair, leaving more questions than before.
The rooms’ destruction keeps the progression legible, as each closing room weakens the seal and draws the game one step closer to the end. The back-and-forth between rooms threatens convolution but never quite tips over, and the whole game is short.
Overall, the puzzle feedback and the dollhouse structure make this a very satisfying finale to the series. The brevity and the lingering mystery are the only complaints.