If you're interested, I can also look for in the Steins;Gate universe.
As of April 2026, these exclusive editions are considered rare collector's items: : Available on eBay for approximately $249.99 . Steins;Gate 0 B&N Exclusive
One user, Luka_Urushibara_real, posted: “El Psy Kongroo. I solved the puzzle. I saw the Codex. And honestly? I wish I hadn’t. The original ending felt hopeful. The Codex makes you feel like a monster for celebrating it. 9/10.” steins gatecodex exclusive
Let me break down the most interesting angles for a post.
For collectors, tracking down a mint-condition copy with an intact, unredeemed digital code has become a quest worthy of a true mad scientist. El Psykongroo: The Verdict If you're interested, I can also look for
Because in the end, the Codex Exclusive teaches us one brutal truth:
The exclusive chapter, "Epigraph of the Closed Loop," forces the player to control a new protagonist—a SERN agent who has hacked into a microwave phone-microwave (the PhoneWave) from a world line where Okabe failed. This "reverse perspective" is the crown jewel of the Codex. It shows that for Okabe to reach Steins Gate, he inadvertently created a prison loop for thousands of other consciousnesses. I solved the puzzle
The game's portrayal of time travel is rooted in the concept of the Novikov Self-Consistency Principle, which proposes that any events that occur through time travel have already occurred and are therefore predetermined. This idea is central to the Steins;Gate Codex Exclusive, as it explores the consequences of changing the past and the potential paradoxes that can arise.
This appears to be a —likely a long-form video, article, or podcast episode—that was published as an exclusive to a collector's community (like a "Codex" group, similar to a Patreon or private forum).