Tales of the Abyss (PlayStation 2)

While the best PlayStation 2 3D Tales entry, it wasn’t available to Europe until a later 3DS port. This game celebrated the 10th Anniversary of the Tales series, and introduced Free Run. To this day, it remains one of the most popular games in the series in Japan.

Unused Techniques and Voice Clips
On the game's disc, some voice clips for attacks that were never implemented are viewable via hacking. Only one unused arte remains in the game.

Luke and Asch have 'Falling Dragon' and 'Ravaging Hell'. Their Japanese names are Tsuiga Soushouzan (Falling Dragon) and Tenma Senretsushou (Ravaging Hell). Their kanji suggests that they're combination arcane artes. For Falling Dragon, the sounds seem like a combination of Senkou Tsuijinga (Light Spear Canon),and Sougazan (Fang Blade). For Ravaging Hell, it sounds like some﻿ sort of combination of Senkou Tsuijinga and Senshouha (Rending Thrust), and the 'Tenma' part may relate to Devil's Inferno.

Tear had a line she was supposed to say after using Innocent Shine: "And purify all!" But the animation is so fast, it skips past this. Also, her Grand Fonic Hymn can be hacked in - it is similar to the one she will use in the final battle against Van, but nothing happens at all once it is done casting.

Anise's unused techniques, of which only voice data remain, are 'Dragon Rampage' and 'Fang Shot'. These were likely incomplete or weaker versions of her existing artes (ie, Dragon Shot). Also, she has 'Fatal strike! Valkyrie Sabre!', most definitely a skill only usable if she equips the Valkyrie accessory for Tokunaga.

Guy's are 'Dragon Swarm', and he has an unused line for Brilliant Overlord: "Behold it's splendour!"

Natalia has a tech called Chronos Raid, which actually remains in the game, but it appears to be a slower version of Piercing Line. Yet, it is an Arcane Arte, so it can be used to trigger Astral Rain. She also has voice data for 'Sting Maker', and 'Behold this Lanvaldearean Arte! Imperial Raid!'. The latter may have been another tech she could learn from Nick, a travelling archery master who teaches her Gallant Barrage and Healing Force. Alternatively, it may have been a FoF change, judging by the line before the arte name.

Dist has voice clips for a Mystic Arte of some kind, and there are two cut-ins that were for this purpose. "Behold this arte of the Rose! You will rue this day! D-Buster!" There are animations for this Arte, but nothing happens if hacked in game.

Likewise, Asch had a second Mystic Arte, with the following quotes: "I'm done playing! Binding Doom! Now die! The weak should stay back!" He has an unused facial cut in, unlike Legretta and Largo (the only other characters that don't have facial cut ins at all)

Largo has voice data for Thunder Beast, a FoF change of Beast. Legretta has several unused spells, namely 'Bright Fear', 'Grieving Rune', and 'Divine Field'. The latter may have created a Light Field of Fonon, similar to Tear's 'Invoke' spells. Alternatively, it may have been similar to Fatal Circle.

Van also has clips for an unused Mystic Arte: "This world ends now! As do you! Majestic Apocalypse!"

Reid was to have an arte called 'Final Dragon Fang', apparently an alternate name for Wyrm Wrath, a FoF change of Tiger Blade. Also, he has voice data for a Mystic Arte he used in his original game, Tales of Eternia: "Sacred Skill! This is it! Aurora Slash!" Philia has data for 'Inspect Eye', an ability she had in Tales of Destiny, and 'Revitalize'. She has no real use for the former, and the second was likely removed due to Mint already being the healer for the cameo battle.

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Cut-in Graphics
Some cut-in graphics never made the cut in the final game. They include:
 * Mint: Time Stop
 * Nanaly: Wild Geese
 * Philia: Big Bang
 * Nebilim
 * Nebilim: Fortunes Arc
 * Asch: Binding Doom
 * Dist: has two, including D-Buster

Regional Differences
The Japanese version was infamously unfinished, making the additions done during its US localization more of a completion: many of them exist in the JP version as unused content, like unused Hi-Ougi, cut-ins, items…

It is worth mentioning that all versions of the 3DS port are based on the US PS2 version, including the Japanese version.

The main US version additions are:
 * Added Mystic Artes (Hi-Ougi in JP) for playable characters:
 * Luke has an extension to his Mystic Arte if Ion is in the party
 * Guy and Natalia have two Mystic Artes
 * Fortunes Arc has an extension
 * Added Mystic Artes (Hi-Ougi in JP) for bosses:
 * The final boss has a second Mystic Arte
 * Nebilim had around 7 Mystic Artes added; some being used by playable characters
 * The cameo bosses now all have their cut-ins; Phila and Rid even have two.
 * Bug fixes, like with Tear and Jade freezing while casting in overlimit, among countless other bugs that riddled the JP version.
 * While all of the skits are voiced in the JP version like the main plot events, they are not dubbed in English, like in Symphonia.