Steins-gate- Kyoukaimenjou No Missing Link - Di... -

, Episode 23 takes a hard left turn. Okabe receives no video mail. No future self guides him. He is left alone with his failure.

No caller ID. Just a text:

The CRT blinked. Not static. Not snow. A single line of green text appeared in the center of the screen: Steins-Gate- Kyoukaimenjou no Missing Link - Di...

: The subtitle "Divide By Zero" alludes to the mathematical impossibility of his situation. He is trapped in a world line where the "Annihilator" (the convergence of the Beta attractor field) makes saving Kurisu appear impossible. The Final Resolve: Amadeus and the Future , Episode 23 takes a hard left turn

It sounds like you're referring to Steins;Gate: Kyoukaimenjou no Missing Link (also known as Steins;Gate: Kyoukaimenjou no Missing Link - Divide By Zero ), the alternate 23rd episode of the original Steins;Gate anime that leads into Steins;Gate 0 . He is left alone with his failure

The first 15 minutes of Divide By Zero mirror the original Episode 23. Okabe travels back in time with Suzuha Amane to save Kurisu, only to inadvertently kill her himself. Upon returning to the present time machine platform, traumatized and broken, the timeline diverges entirely from the original series.