Kamen Rider Alterum [Earth-2042]

The world has been plagued by the ZV002 Zombie virus, which has infected and turned 95% of the existing human civilization into the mindless undead. Hiroki Tennyson, the protagonist, is a brave young man and a desert wanderer of sorts, without family and attachments. Having overseen his good deeds and resilience, a mysterious white-haired girl by the name "Eunice" grants him the mysterious power that comes from the aliens -- the Alterum Driver. With said device, Hiroki Tennyson is allowed to transform into the masked and armored warrior: Kamen Rider Alterum. This story follows such a chaotic world where the player has to fight against several various enemies and end it all. But sure, it's up to you, player, and the AI to decide the ending!