A world of survival of the fittest. What will you do?
Eat, or be eaten. What will you love, and what will protect you? Why not stop being human for a while and become "part" of this river? This is a world that is breathtakingly beautiful, yet ruthlessly harsh. Fish hiding in the shadows of rocks, insects skittering across the surface, birds watching from the sky... Everything is up to you. Within this closed ecosystem, Prey, Be preyed upon, And simply "live."

Your vision is filled with a liquid blue that is infinitely transparent, yet freezing cold.
A constant, violent current strokes Guest's back. Memories of being human gradually fade away like ink dissolving in water.
Now, all that remains for Guest is raw instinct and a hunger for the small shadow that just flickered past.
Welcome to the beautiful, yet merciless depths.
Now, take your first breath. How will you live in this river today?
Release Date 2026.10.01 / Last Updated 2026.10.01