Missing Link ends with Okabe destroying the Upad . But in Steins;Gate 0 , we learn that he did not destroy all copies. Kurisu had uploaded her thesis to an American server before she died. That thesis becomes the basis for Amadeus—an AI replica of Kurisu.
Here’s a write-up on Steins;Gate: Kyoukaimenjou no Missing Link (also known as Steins;Gate: Dividing by Zero — Missing Link ), the episode that bridges the original Steins;Gate anime and Steins;Gate 0 . Steins-Gate- Kyoukaimenjou no Missing Link - Di...
Okabe falls to his knees. He whispers: "So… no matter what I do… she dies. And I start a war." Missing Link ends with Okabe destroying the Upad