The Room 4 Old Sins V15.02.2021 May 2026

It seems you're referring to "The Room 4: Old Sins" with a specific version number v15.02.2021 (likely meaning February 15, 2021).

: The Waldegraves have vanished under mysterious circumstances. As you explore the dollhouse, you find letters and journals that reveal Edward was obsessed with a mysterious, ethereal element called The Dollhouse The Room 4 Old Sins v15.02.2021

The Study: Lined with journals detailing Edward’s contact with an entity that promised infinite knowledge but demanded a terrifying price. It seems you're referring to "The Room 4:

The State of Play: What is The Room 4: Old Sins?

Released originally in 2018 for iOS (and later for Android and Windows), The Room 4: Old Sins deviates slightly from the numerical naming convention. While it is the fourth game chronologically, the "Old Sins" subtitle points to a prequel/standalone story. Players step into the shoes of an investigator drawn to a derelict attic in a gloomy English manor. The objective? Find a missing engineer and his enigmatic wife. The State of Play: What is The Room 4: Old Sins

Why v15.02.2021 is the Definitive Version

If you see The Room 4 on the Play Store or App Store today, you are likely downloading v15.02.2021 automatically. However, if you have an older APK or sideloaded an older version, you are missing out.