Opus Castle

Opus Castle is a free-to-play indie horror adventure game with a first-person view, based on the true story of a murder that took place in the Brazilian castle of Castellinho da Rua Apa in the 1930s. According to the plot, the main character wakes up in a castle next to a body riddled with bullets. The players' task is to understand what happened by exploring Castelinho and learning its secrets.