November 2020, the Beta World Line... In this world, Rintaro Okabe has given up. After suffering through indescribable grief and untold heartbreak, he gives up on saving the girl he loves. But one day, he meets her again, just not as he knew her. From this chance encounter, the gears of fate would begin to turn once more. The heroes of Steins;Gate return for a new time-altering story set in an alternate world where the Future Gadget Lab members failed in their original mission. Can one final chance lead to a happy ending?

The conclusion of STEINS;GATE 0! Mayuri learns that her life was unknowingly saved thanks to Kurisu's sacrifice on another world line. Thus, in order to save Rintaro Okabe (or rather, in order to resurrect Hououin Kyouma) Mayuri decides to enact Operation Arclight... a time-travel mission to the past! The heroes of Steins;Gate return for a new time-altering story set in an alternate world where the Future Gadget Lab members failed in their original mission. Can one final chance lead to a happy ending?

The world line shifts, and Rintaro Okabe inexplicably finds himself waking up in the future. The year? 2036. The world looks exactly as he'd been warned about; a hellish landscape rife with death and destruction. After witnessing this grim fate, Rintaro stands tall and steels his heart, resolved to put an end to this future once and for all. The heroes of Steins;Gate return for a new time-altering story set in an alternate world where the Future Gadget Lab members failed in their original mission. Can one final chance lead to a happy ending?