58%Good matchZERO PROTOCOL
87%41187% positive reviews, Very Positive across 411 reviews·Survival Horror · Atmospheric
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CodeX is probably the worlds hardest first person adventure game with a thrilling story told via environmental storytelling. Will you be able to solve your Mystery?
From the Diary:
The days go by and I keep getting stuck here. Again and again and again... Why do I keep making mistakes somewhere? Everything is merging but I won't give up on you...

Play a scientist in this FPP Adventure Game. Explore the Mansion over and over again and learn from your mistakes. Can you escape time? It will be the most difficult task you have ever undertaken and...
Nobody will Hold your Hand!

CodeX is an atmospheric adventure game that doesn't have any hints, in-game marker, quest log or savepoint. The story is told through Environmental Storytelling and the player has to find out for himself how to progress by using or moving objects and solving small puzzles...
...will you play? will you understand?
Important note from the developer:
This game is for all those who are tired of today's games showing everything, using markers, waypoints everywhere etc. even for the simplest things.
For everyone who wants to enjoy and discover a game themselves and doesn't want to be guided by the hand about what to do and where to go...
This game require very high pc specs, please do not buy if your pc does not meet the minimum requirements
This game is probably the worlds hardest adventure game! Are you ready?
Steam data © 2026 Valve Corporation. Trademarks are property of their respective owners.
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The best games like CodeX are ZERO PROTOCOL, Dark Fall: The Journal, Zero Escape: Zero Time Dilemma, Meridian 157: Chapter 1, and Psych.
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