The Kuwait-based solo developer studio SimmeringConcrete has announced that its upcoming psychological horror title Toxoplasma has received a demo on Steam, now available for PC. The experience places players in a tense and unsettling scenario, focused on survival within an isolated environment filled with mystery.

In Toxoplasma, you are trapped on an abandoned space station, developing a bio-weapon that makes the infected hallucinate demonic entities. Spot any anomalous signs of infection before they kill you, complete your research, and unmask the conspiracy that brought you here.

The demo introduces players to the setting and reveals early elements of the narrative, presenting the oppressive atmosphere of the abandoned space station. During the experience, more than 20 possible anomalies and hallucinations may arise as the player develops the bio-weapon on a daily basis, requiring constant attention and quick thinking.

"When I first started working on Toxoplasma in 2025, I wanted it to leave an impact on the player." Shared solo developer Mohammad Baqer. "The psychological horror games that stuck with me the most are the ones that played into real human fears and experiences; for example, seeing your loved ones change due to mental illness, the eventual loss of them, and the aftermath. These are the themes of Toxoplasma. I truly hope that the players will enjoy a fun and spooky experience that leaves them thinking as well!" Anyone who is contaminated hallucinates demonic entities that torment them until they die. You must complete its development before your hallucinations kill you. You must figure out why you are trapped here.

The infection manifests differently in each playthrough, ensuring that no two experiences are identical, which enhances unpredictability and reinforces the psychological horror for both newcomers and veterans.

Among the main gameplay highlights is the need to identify anomalies before hallucinations become fatal, while progressing in the development of the bio-weapon and attempting to distinguish reality from demonic visions. Players must also piece together scattered evidence and radio transmissions to understand the conspiracy behind their mission.

The choices made throughout the journey directly influence the outcomes, offering multiple endings, including a hidden one. This narrative approach strengthens the investigative aspect and increases replay value, establishing the experience as an intense dive into fear, paranoia, and discovery.