Lethe - Episode One is a first-person survival horror adventure game developed by KoukouStudios. The game is set in a mining settlement where the protagonist, Robert Dawn, arrives in search of his origins. However, he comes into contact with an unknown substance that gives him psychokinetic abilities, which feed on his life energy. As the tension rises, he faces a dark threat that turns his trip into a terrifying battle for survival.

The game has a stealth gameplay feature that allows the player to run or hide to survive. The player can also manipulate the environment using their newly gained abilities, but they can only affect inorganic objects. The graphics of the game are highly detailed and contribute to the immersive experience. The game's story is unique, and the player's understanding of the places they'll visit is entirely up to their exploration.

Lethe - Episode One is a stand-alone experience, and any future episodes will expand upon the game's lore and backstory. The game is available only on the Windows platform, and the full version is licensed. Overall, Lethe - Episode One is an excellent game for those who love survival horror and adventure games with a unique storyline.