Lost Prototype is an indie, released 20 June 2025 on PC (Microsoft Windows).
What Lost Prototype is
Lost Prototype was released in 2025. It is available on PC (Microsoft Windows) only. It runs on Unreal Engine 5.
The premise, in the publisher's words
Lost Prototype is a walking simulator in which you have to find your way out of a maze under construction. But be aware, you're not alone in this place. Something is following you and wants to erase all your progress.
How it plays
Its themes are horror. It is a single-player game with no multiplayer component.
What it launched against
Lost Prototype launched on 20 June 2025, within three weeks of Death Stranding 2: On the Beach, Dune: Awakening, The Alters and Elden Ring Nightreign.
Released around the same time: Death Stranding 2: On the Beach, Dune: Awakening, The Alters, Elden Ring Nightreign.
Screenshots
All media
Quick answers
Lost Prototype — frequently asked questions
When did Lost Prototype come out?
Lost Prototype was released on 20 June 2025 for PC (Microsoft Windows).
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