Deep Siren gameplay trailer shows hand-drawn WWII horror

Dionous Games and developer Made From Strings released a gameplay trailer for Deep Siren, depicting a frightening tale taking place in a historical wartime period. The game follows Alexander Calder, the sole survivor of the U.S.S. Siren, as he encounters supernatural horrors underwater. The footage highlights mechanics where individuals must shut their eyelids to separate truth from illusions. Players can find collectible secrets to unlock cosmetic changes for the HUD. The experience includes a full voiceover and an original soundtrack. Developers warn the game contains violence, horror, and mature themes. A free demo launched on Steam on October 16, 2026, and is available during Steam Next Fest from October 19 to 26.