Steins;Gate Episode 24 - Achievement Point

Picking up a light-up sword to use its liquid as a substitute for Kurisu's blood, Rintaro and Suzuha return to the day of Kurisu's death. To prevent a Metal Upa toy from ending up with Nakabachi's papers (which previously saved them from being destroyed in a fire on the plane flight), Rintaro obtains it himself first from the toy machine so that Mayuri ends up with a plastic one, which would later make its way to Kurisu and Nakabachi. Finding that the liquid in the gadget has dried up, Rintaro provokes Nakabachi into stabbing him, leading Nakabachi to run off in fear with Kurisu's research papers. After knocking Kurisu out with a taser, Rintaro uses his own blood from the stab wound to recreate the scene he originally saw, fooling his past self and sending him on his time-hopping journey. As Rintaro returns to the present, Suzuha gives her thanks before disappearing, as she does not yet exist in the Steins Gate world line. After recovering from his wounds, Rintaro starts giving out badges to the lab members he recruited in other World Lines, saving one for Suzuha, who will arrive into their World Line in seven years. Later, while walking in the streets of Akihabara, Rintaro has a chance encounter with Kurisu, who appears to have retained some memories of the other World Lines.