Ad Infinitum was released in 2023. It is a psychological horror game set during World War I.
At the center of Ad Infinitum’s story is a soldier haunted by the horrors of war. In terms of gameplay, it is a walking simulator with quest elements and “stealth labyrinths” where you have to run away from monsters.
Ad Infinitum has fewer than 50 reviews, over 80% of which are positive. Its peak concurrent player count on Steam reached 118 players.
Traces of the Ad Infinitum project can be found back on Steam pages from 2015, and there is also a 2015 trailer.
Ad Infinitum trailer (2023): https://youtu.be/X__aOJjcJ1Q