Uncover the mystery of Thalassa, a first-person psychological drama set under the sea. Ill-fate has fallen on your former crew and friends and it’s up to you to find answers onboard the wreckage. Experience the melancholic underwater journey of human stories facing life and loss.
Players describe navigating the beautifully crafted and highly detailed underwater wreckage of the Thalassa ship as a core part of the gameplay. The slow, "whooshing" movements of the character as they move through the water in a diving suit create a strong sense of atmosphere and immersion, evoking a feeling of calm and isolated deep-sea exploration.
Piecing together the fate of the Thalassa and its crew is a key gameplay mechanic. Players collect various clues, documents, and audio recordings scattered throughout the ship, which they can then use to solve "mysteries" on an in-game inquiry board. Reviewers note that this system effectively guides players towards relevant evidence while still requiring them to mentally make the connections to complete the mysteries, providing a satisfying detective-like experience.
While exploration and investigation are central to the gameplay, the compelling and emotionally impactful narrative is a major draw for many players. The game is described as a "psychological drama" that delves into the complex emotions and personal struggles of the Thalassa's crew. As players uncover the fate of the characters, several reviewers mention becoming deeply invested in the story.
Some reviewers note occasional frustration with the game's deliberate pacing, such as sluggish camera movements and door openings. However, this slow tempo is also seen as fitting the contemplative tone and atmospheric nature of the experience. Additionally, the relatively simple gameplay mechanics and lack of challenge are noted as making the game accessible to a wide range of players, including those who may not typically engage with more complex or action-oriented titles.