Old Sins V15.02.2021 ((link)): The Room 4
The Room 4: Old Sins v15.02.2021 refers to the highly acclaimed PC release of the fourth installment in the iconic puzzle series by Fireproof Games. Originally a mobile title, this specific version brought the game’s intricate mechanical puzzles to desktops with significantly upgraded visuals and refined controls. The Gateway to Waldegrave Manor
Tactile Feedback: Though played with a mouse, the game preserves the series’ signature "tactile" feel, where every click and drag of a lever or dial feels heavy and mechanical.
The Hub Mechanic: The dollhouse acts as a central hub. Solving a puzzle in the Kitchen might provide a part for a machine in the Maritime Room or unlock the Garden. The Room 4 Old Sins v15.02.2021
Platforms:
The game centers on the mysterious disappearance of Edward Lockwood, an ambitious engineer, and his high-society wife, Abigail. As a collector working for the secretive organization known as "The Circle," you are sent to Waldegrave Manor to retrieve a powerful, reality-warping artifact called the Null. Your investigation leads you to the manor's attic, where you discover a hauntingly detailed dollhouse—a perfect replica of the home that serves as the portal to the game's many secrets. Atmosphere and Visual Evolution The Room 4: Old Sins v15
Atmospheric Horror: The dollhouse setting creates a unique sense of scale, allowing you to "shrink" into its rooms while maintaining a constant, unsettling feeling of being watched from the dark attic. Interconnected Puzzle Design
Chapter 3 – The Kitchen & Servants’ Quarters
| Puzzle | Goal | Solution Steps | Key Items |
|--------|------|----------------|-----------|
| 3‑A: The Burnt Recipe | Reveal the hidden compartment under the stove. | 1. Swipe the heat gauge to its maximum (the stove glows red).
2. Tap the smoke vent – a puff of steam reveals a loose tile.
3. Pull the tile to open the compartment. | Rusty Fork (used as a lever later). |
| 3‑B: The Water‑Pipe Maze | Align the water flow to fill the basin. | 1. Rotate each pipe segment until a continuous line connects the main valve to the basin.
2. Activate the valve; water fills the basin, raising a floating key. | Floating Key (opens the Observatory door). |
| 3‑C: The Servant’s Diary | Unlock the hidden message about “the second fire”. | 1. Place the Mysterious Medallion onto the pendant slot on the desk.
2. The diary page slides aside, showing a faint ink‑blue symbol. | Second‑Fire Symbol (used in Chapter 5). | The Hub Mechanic: The dollhouse acts as a central hub
The Eyepiece: A staple of the series, this lens reveals hidden Null-based clues and allows you to look inside objects to see their internal mechanisms.