Deep Siren Demo

Deep Siren is a Lovecraftian WWII horror fairytale. When the lone survivor of the USS Siren discovers a mermaid while adrift at sea, he finds himself plunged into a world of supernatural horror fathoms beneath the surface. Utilize unique gameplay mechanics as Alex battles to hold on to his sanity.

About Deep Siren Demo

Deep Siren Demo is a free Steam demo from Made from Strings. Steam files it under Adventure. It supports single-player and runs on Windows, macOS and Linux / Steam Deck. Steam lists the release date as Sep 27, 2026. We first spotted it on Oct 20, 2026.

Type

Steam demo

Status

open

For

Deep Siren

Developer

Made from Strings

Genres

Adventure

Platforms

Windows, macOS, Linux / Steam Deck

Release

Sep 27, 2026

First seen

2026-10-20