Steins;Gate: The Distant Valhalla

Fanmade visual novel adaptation of the light novel of the same name.

Set in the Alpha Attractor Field after the Rounders raid at the lab, Okabe, Daru and Kurisu have all been taken to SERN and are confined there. One day – Okabe and Daru initiate “Operation Valhalla”: The mission with the aim of escaping SERN, supported by a mysterious person using the alias “Neidhardt”.