Depths of Sanity is a 2D Metroidvania-style game developed by Bomb Shelter Games and released in 2019. The game is set in a dark, underwater environment and follows the story of a lone submarine pilot searching for survivors of a missing research team. Key features of the game include: 1. Unique submarine combat system: Instead of traditional platformer controls, players navigate a submarine through the depths, adding a distinct feel to exploration and combat. 2. Cosmic horror elements: The game draws inspiration from Lovecraftian themes, creating an atmosphere of dread and unknown terrors lurking in the deep. 3. Sonar mechanic: Players use sonar to navigate and reveal hidden areas, adding a layer of strategy to exploration. 4. Upgradeable submarine: As players progress, they can enhance their submarine with various weapons and abilities, allowing access to new areas and improving combat capabilities. 5. Boss battles: The game features challenging encounters with massive sea creatures and otherworldly beings. 6. Environmental storytelling: Much of the narrative is conveyed through the game's atmospheric visuals and audio design, as well as environmental clues. 7. Multiple endings: The game offers different conclusions based on player choices and actions throughout the story. 8. Pixel art style: The visuals are rendered in a detailed pixel art style that effectively conveys the eerie underwater setting. Depths of Sanity stands out in the Metroidvania genre for its unique setting, submarine-based gameplay, and cosmic horror elements, offering a fresh take on familiar mechanics.