: Requires a 64-bit OS (Windows 10/11), 8GB RAM, and a GTX 1060 or AMD Radeon RX 580. 2. Protocol (by Fair Games Studio)
: This title was notably offered for free on the Epic Games Store in August 2024 and again in late 2025 as part of their holiday giveaways. protocol-pc-game-free-download-full-version
A 2018 first-person sci-fi adventure game that blends dark comedy and puzzle-solving. : Requires a 64-bit OS (Windows 10/11), 8GB
: Players take on the role of Jacob Lee, an inmate at Black Iron Prison on Jupiter's moon, Callisto. The game features a "brutal" combat system that emphasizes tactical limb-hacking and a unique directional dodge mechanic. A 2018 first-person sci-fi adventure game that blends
: Available for purchase on Steam and itch.io . A free demo version is often available on itch.io for those wishing to try before buying. 3. Blue Protocol: Star Resonance The Callisto Protocolâ„¢ on Steam
: Players must interact with a strict Artificial Intelligence in an Arctic research facility. Failure to follow the "Protocol" (instructions) often leads to immediate, absurd consequences.