IMMORTALITY – a horror game that tells the story of Marisa Marcel. The gameplay is presented in a cinematic style, offering hundreds of videos and pre-recorded scenes on a video camera. Thanks to them, the plot is told. At many points in the gameplay, there are interactive moments where the player can choose what to interact with, what object to examine, where to move next, or what line to answer the interlocutor.

The gamer takes control of a detective who is drawn into a mysterious crime. He needs to investigate the causes and find out who the criminal is. The gameplay combines elements of an interactive novel and cinematic narration. During the gameplay, the user will have to communicate with secondary characters and extract a lot of information with their help.

Each NPC will give some evidence, but the protagonist does not know who exactly is the criminal. Based on their dialogue, the user himself makes a decision whether to trust the interlocutor or not. The choices affect the further passage and change the ending of the game. The gameplay presents dozens of films, audio recordings, diaries and many other sources of information, gradually leading to the solution of who exactly is the criminal.