Abyss Replica Facility

The Abyss Replica Facility is a hidden, optional dungeon in Tales of the Abyss.

History
Located within Ortion Cavern, the Abyss Replica Facility can only be accessed on a second playthrough or later after having completed the sidequest involving the rescue of Shiba, as well as the sidequest in the eastern part of Ortion Cavern. Speaking to two men in Sheridan, followed by Shiba, will allow entrance to the dungeon. Shiba accompanies the group to the facility, mining away blocked door entrances in exchange for Gald while his health periodically depletes as a result. If at any point Shiba's health depletes entirely, the player will be returned to the entrance of the dungeon, albeit with all passages Shiba mined still cleared.

Within the many rooms of the maze-like dungeon, the group finds strange machine generators that must be destroyed using Mieu's smash attack. A large number of the rooms contain nothing, while others yield treasure chests with valuable items, healing springs, and consequential traps. Halfway through the large facility, the group discovers replicas of the God-Generals Arietta, Largo, Legretta, and Sync that Dist created and sealed within the dungeon. The replicas do not speak but instead fight against the group, the Legretta replica entering the fight only once one of the replicas of Arietta, Largo, and Sync is killed. In the absolute deepest part of the facility, the group finds and faces a replica abomination called Replicantis.