• Air date: 12 Apr '18 23 episodes
      The dark untold story of Steins;Gate that leads with the eccentric mad scientist Okabe, struggling to recover from a failed attempt at rescuing Kurisu. He decides to give up and abandons his lively scientist alter ego, in pursuit to forget the past. When all seems to be normal, he is seemingly pulled back into the past by meeting an acquaintance of Kurisu, who tells him that they have begun testing a device that stores the memory of a human and creates a simulation of them with their characteristics and personalities. Okabe begins testing and finds out that the simulation of Kurisu has brought back anguish and some new unexpected tragedies. Zero is a side story that explores events from the Beta Attractor Field's future that contribute in making the end of the original story possible.
  • List of Episodes (23)
    • 1. Missing Link of the Annihilator -Absolute Zero-

      12 Apr '18
      Though WWIII is on the horizon, Okabe attempts to live a normal college life. However, a newly developed AI is about to shake up his world.
    • 2. Epigraph of the Closed Curve -Closed Epigraph-

      19 Apr '18
      After a chance encounter with Maho where they discover knowing someone in common, Okabe has his first face-to-face with her special AI, Amadeus.
    • 3. Protocol of the Two-sided Gospel -X-day Protocol-

      25 Apr '18
      Mayuri tries to bring everyone together for a Christmas party at the lab, but Okabe has a rude awakening.
    • 4. Solitude of the Mournful Flow -A Stray Sheep-

      03 May '18
      While Okabe Rintarou briefly has a vision of a world line where he is caught up in the middle of a war, which he eventually comes to realize was his Reading Steiner taking effect. Meanwhile, Suzuha explains to Daru that she is looking for Kagari Shiina, Mayuri's future adopted daughter who time-traveled with her from the year 2036 but became separated from her in 1998. As Rintarou decides to help with the search, he gets a call from Ruka Urashibara about a pressing matter before finding Moeka
    • 5. Solitude of the Astigmatism -Entangled Sheep-

      10 May '18
      Their search continues as New Years swiftly approaches, though Ruka's dilemma with a certain guest might make matters worse.
    • 6. Eclipse of Orbital Ordering -The Orbital Eclipse-

      17 May '18
      Now that the girl's identity is known, Okabe and friends kick off the New Years with a shrine visit and party to never forget.
    • 7. Eclipse of Vibronic Transition: Vibronic Transition

      23 May '18
      The armed men attempt to abduct Kagari but are forced to flee empty-handed when Yugo Tennouji arrives and disarms them. Concluding that group are not the same Rounders he had previously encountered, Rintaro approaches Tennouji, using his knowledge over him being a member of a Rounders to acquire his help in protecting Kagari. Meanwhile, as Maho continues to find herself locked out of Amadeus, Ruka tries to question of Suzuha over what everyone is keeping from him. Later, Rintaro suddenly
    • 8. Dual of Antinomy: Antinomic Dual

      30 May '18
      Rintaro soon comes to realise that he has once again ended up in the alpha world line where Mayuri is dead, as the Rintaro of this world line couldn't go through with sacrificing Kurisu in order to save her. Realising that this Rintaro came from another world line, Kurisu reveals she has rebuilt the Phone Microwave, asking him to use it to return to his world line. As Rintaro struggles with his decision, Kurisu takes him to Mayuri's grave, urging him to wake up from his dream. After advising
    • 9. Pandora of Eternal Return: Pandora's Box

      06 Jun '18
      As Rintaro arrives back in the beta world line, where Amadeus' takeover has been prevented, he discovers Mayuri's friend Katsumi "Fubuki" Nakase, who was hospitalized after they both collapsed, has memories of the alpha world line he was just in. After arranging for Maho to stay with Faris after her hotel is burgled, Rintaro is questioned by Suzuha about the shift in world line, revealing that it was caused by time machine experiments by America and Russia. Fearing she is running out of time,
    • 10. Pandora of Provable Existence: Forbidden Cubicle

      14 Jun '18
      Hiring Moeka as a bodyguard, Maho gets Amadeus running again and resumes testing with Rintaro before having a slumber party with Faris and Moeka. The next day, Rintaro, Maho, and Amadeus spend the day going around Akihabara, ending up at the Radio Building where Kurisu was killed. After Maho reveals to him that she possesses Kurisu's laptop, Rintaro warns her that the data on it is what will spark World War III.
    • 11. Pandora of Forgotten Existence: Sealed Reliquary

      21 Jun '18
      Meeting up with Daru, who had been hired by Maho to analyze Kurisu's laptop, Rintaro decides to tell Maho the truth about time machines, warning her that she mustn't attempt to use one herself to save Kurisu. The group become surrounded by a hostile group who take Maho hostage, demanding the laptop in exchange. However, another group appears and destroys the laptop, leaving Maho upset that she couldn't protect Kurisu's legacy. Later, Maho and Alexis return to America, bringing Rintaro's time
    • 12. Mother Goose of Mutual Recursion: Recursive Mother Goose

      28 Jun '18
      Kagari collapses again after hearing Mayuri singing a song, which Rintaro believes may be a hint to regaining her memories. He finds that Mayuri had learned the song from Suzuha, who herself had learned it from Yuki in the future. Yuki then reveals she had learned the song from Rintaro's mother, who claims he was the one who sang it to her back when he first started his mad scientist phase. While visiting Mayuri's grandmother's grave for any clues, Kagari goes into a daze upon hearing a song on
    • 13. Mother Goose of Distractive Recitativo: Distraction Mother Goose

      04 Jul '18
      Despite Kagari regaining her childhood memories of Mayuri, who is informed about her future relationship with her, Rintaro and Daru remain curious about what happened during the past twelve years that she still doesn't remember. During an argument with her, Suzuha notices a contradiction in Kagari's recollection of their seperation, with Tennouji suggesting to Rintaro that it may be the result of brainwashing by a third party. The next day, Rintaro goes with Moeka to investigate an abandoned
    • 14. Recognition of the Elastic Limit -Presage or Recognize-

      18 Jul '18
      Shocked by a surprise attack, Suzuha and Daru look to America as their last hope to save the world.
    • 15. Recognition of the Asymptotic Line -Recognize Asymptote-

      25 Jul '18
      Fed up with her Dad's passiveness, Suzuha must make a man out of Daru before Yuki ends up with somebody else.
    • 16. Altair of the Point at Infinity -Vega and Altair-

      01 Aug '18
      Okabe's stubbornness causes fists to fly and tears to be shed as the deadline for using the time machine swiftly approaches.
    • 17. Altair of the Hyperbolic Plane -Beltrami Pseudosphere-

      08 Aug '18
      As Suzuha sets off to finish her mission, Mayuri finds determination of her own. But then, disaster strikes.
    • 18. Altair of Translational Symmetry -Translational Symmetry-

      15 Aug '18
      All hell breaks loose over the time machine when a villain from the future haunts the past and unveils their devious plan.
    • 19. Altair of the Cyclic Coordinate -Time-leap Machine-

      23 Aug '18
      War and disaster has come, and the only way Okabe can stop it is to rely on his friends, determination, and hope.
    • 20. Rinascimento of the Unwavering Promise -Promised Rinascimento-

      06 Sep '18
      Okabe awakes in a cold, lifeless world where he finds his friends struggling to survive amidst all the chaos.
    • 21. Rinascimento of Image Formation -Return of Phoenix-

      12 Sep '18
      Setting forth on a long and arduous journey, Okabe seeks to rekindle his hope and revive what all had thought gone.
    • 22. Rinascimento of Projection -Project Amadeus-

      19 Sep '18
      In their struggle to save the time machine, the lab members brainstorm to circumvent convergence but realize it cannot be done without sacrifice.
    • 23. Arclight of the Point at Infinity: Arclight of the Sky

      26 Sep '18
      Arriving in a world line where Amadeus doesn't exist, Rintaro heads towards the roof, receiving help from Moeka in getting past Leskinen. As Rintaro urges Mayuri and Suzuha to head to the past, Kagari, who decides to place her faith in Rintaro, helps him to hold back the enemy just long enough for the time machine to successfully leave before the helicopter attacks. Arriving just before Rintaro returns from his failed rescue attempt, Mayuri calls her past self and encourages her to set Rintaro