enemies if Aya maintains a sustained assault. After a time, a triangle icon appears on enemies, allowing her to perform an Overdive attack, dealing high damage to the targeted enemy. During combat, Aya gains experience points and gains experience levels when a certain quantity is achieved. Gaining a level both restores her health and raises her maximum health and energy levels. Weapons also gain levels the more they are used. In addition to leveling up, Aya's stats can be customized using Over Energy (OE) clips found during missions or acquired during Overdive attacks. Using a 3x3 grid accessed in the hub area, certain OE clips grant different stat boosts and abilities. Creating a new grid automatically deletes the effects of the original. Plot The game's story plays out in episodes, similar to a television series, with many events told out of sequence. On Christmas Eve of 2012, monstrous creatures dubbed as "Babels" appear in New York City. Along with lifeforms spawned by them called the Twisted, they lay waste to the city and consume any human in their path. By the following year, an investigatory team known as the CTI (Counter Twisted Investigation) has been formed. One of the CTI members is Aya Brea, who was found outside St. Thomson's Cathedral in 2010, just before the Babels and Twisted began appearing. Dr. Hyde Bohr, Chief of the CTI, finds that Aya is suffering from amnesia, and that her personality has changed. After taking Aya in, the CTI discovered that she was capable of transferring her soul from body to body independent of time, an ability dubbed "Overdive", which enables her to fight the Twisted. Bohr and the others planned to use this unique ability to travel back through time and prevent the disaster, developing a machine called "Overdive System" to allow Aya to travel into the past and change events. As she embarks on each mission, she is confronted by powerful, sentient Twisted born from corrupted humans, later dubbed High Ones. One such High One is Kyle Madigan, a man she met and fell in love with during Parasite Eve II. As she defeats each High One, she regains pieces of her memory, most prominently her memories of being engaged to Kyle, and the existence of Eve Brea, her adopted sister. After an incident that saw the CTI HQ and the Overdive device destroyed by the Kyle High One, Aya