1Missing Link of the Annihilator -Absolute Zero-
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.
2Epigraph of the Closed Curve -Closed Epigraph-
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.
3Protocol of the Two-sided Gospel -X-day Protocol-
Mayuri tries to bring everyone together for a Christmas party at the lab, but Okabe has a rude awakening.
4Solitude of the Mournful Flow -A Stray Sheep-
While Okabe is left with more questions than answers, Suzuha recruits help in her search for an unexpectedly close person.
5Solitude of the Astigmatism -Entangled Sheep-
Their search continues as New Years swiftly approaches, though Ruka's dilemma with a certain guest might make matters worse.
6Eclipse of Orbital Ordering -The Orbital Eclipse-
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.
7Eclipse of Vibronic Transition -Vibronic Transition-
As Okabe seeks answers regarding the attack, trouble with Amadeus brings a surprising turn of events.
8Dual of Antinomy -Antinomic Dual-
Okabe is given a bittersweet reminder that in changing world lines, sacrifices must be made.
9Pandora of Eternal Return -Pandora's Box-
It will take time for Okabe to identify the attackers and their motivation, but the impending crisis of WWIII forces Suzuha to resort to desperate measures.
10Pandora of Provable Existence -Forbidden Cubicle-
After reinforcements are called to clean Maho's disastrous room, her and Okabe's Akihabara date ends with a surprising confession from Maho.
11Pandora of Forgotten Existence -Sealed Reliquary-
Okabe must convince Maho to give up her prized possession, but an unexpected danger has them negotiating for their own lives.
12Mother Goose of Mutual Recursion -Recursive Mother Goose-
Kagari attempts to track down the origins of a song in hopes that she discovers her lost memories.
13Mother Goose of Diffractive Recitativo -Diffraction Mother Goose-
After finally obtaining a hint into Kagari's lost past, Okabe ends up discovering much more than he bargained for.
14Recognition of the Elastic Limit -Presage or Recognize-
Shocked by a surprise attack, Suzuha and Daru look to America as their last hope to save the world.
15Recognition of the Asymptotic Line -Recognize Asymptote-
Fed up with her Dad's passiveness, Suzuha must make a man out of Daru before Yuki ends up with somebody else.
16Altair of the Point at Infinity -Vega and Altair-
Okabe's stubbornness causes fists to fly and tears to be shed as the deadline for using the time machine swiftly approaches.
17Altair of the Hyperbolic Plane -Beltrami Pseudosphere-
As Suzuha sets off to finish her mission, Mayuri finds determination of her own. But then, disaster strikes.
18Altair of Translational Symmetry -Translational Symmetry-
All hell breaks loose over the time machine when a villain from the future haunts the past and unveils their devious plan.
19Altair of the Cyclic Coordinate -Time-leap Machine-
War and disaster has come, and the only way Okabe can stop it is to rely on his friends, determination, and hope.
20Rinascimento of the Unwavering Promise -Promised Rinascimento-
Okabe awakes in a cold, lifeless world where he finds his friends struggling to survive amidst all the chaos.
21Rinascimento of Image Formation -Return of Phoenix-
Setting forth on a long and arduous journey, Okabe seeks to rekindle his hope and revive what all had thought gone.
22Rinascimento of Projection -Project Amadeus-
In their struggle to save the time machine, the lab members brainstorm to circumvent convergence but realize it cannot be done without sacrifice.
23Arclight of the Point at Infinity -Arc-light of the Sky-
Okabe and his friends must battle against fate in the past, present, and future to find Steins Gate and reunite the lab members once and for all.