Paradox Protocol game cover

Paradox Protocol CD Key

Survival horror game set in another dimension: scavenge, craft, and build a base while fighting enemies and managing health and sanity. Left Behind mode is playable now in single-player, with procedurally generated maps. Full release plans include campaign co-op (up to 6), requisition, and tactical missions.
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Current Lowest Price

5.99$
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Release Date

11 Dec, 2025

Publisher/Developer

Nightmare Nexus LTD

Reviews

Steam: -
Metacritic: -

Paradox Protocol Steam Price History Chart

Current Steam price: 5.99$
Lowest Steam price ever: 4.19$ — 2025-12-25
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Paradox Protocol description

Paradox Protocol

Paradox Protocol is a sci-fi survival and exploration game set in a hostile, fractured dimension where every decision matters. You play as an operative pushed beyond the edge of reality, forced to scavenge, craft, and fight to stay alive while uncovering what went wrong—and how to get home.

Available now in Early Access, the game currently features the Left Behind (Stranded) mode as a playable single-player experience, with a multiplayer build in production. You’ll explore dangerous environments, gather resources, and build up a defensible base while being hunted by enemy entities that can spot you, chase you, and attack—while also attempting to search for you if they lose sight.

Survive with systems that fight back

  • Crafting, building, and survival gameplay (prototype systems currently available and evolving through development)
  • In-depth health system with multiple health states and dynamic debuffs that reward preparation and smart resource management
  • Sanity system that deteriorates under pressure—risk hallucinations and escalating threats as your mind unravels

Play solo now, co-op planned

Paradox Protocol is designed for both single-player and co-op gameplay. Multiplayer is currently disabled due to matchmaking/server discovery issues, but the team is actively working to restore it so players can tackle modes together.

Planned modes and content

At full release, Paradox Protocol is planned to include four major modes, releasing in stages throughout Early Access:

  • Story Mode (Campaign) — A multi-act narrative playable solo or in co-op (up to 6 players), with scaling difficulty and puzzle adjustments for group play.
  • Left Behind (Stranded) Mode — A survival-focused experience with expanded mechanics such as base building and additional stats like hunger, thirst, and temperature.
  • Requisition Mode — Explore a large procedurally generated map to collect valuable crystals, meet a quota, and extract. Surplus rewards support progression, gear upgrades, and loadout customization.
  • Tactical Operations Mode — A catalogue of scored missions and objective-based scenarios that run parallel to the campaign, expanding the world with additional stories and challenges.

Enter the anomaly. Adapt, endure, and push deeper into the unknown—because in Paradox Protocol, survival is only the beginning.