Omega (Final Fantasy XV)

Omega is an optional superboss in the Insomnia Ruins dungeon exclusive to the Royal Edition expansion and the PC version of Final Fantasy XV. It is a warmech associated with the ancient civilization of Solheim, entering the battle through a portal identical to the platforms in various Solheimian ruins, such as the Costlemark Tower and the Pitioss Ruins. The party calls its appearance as "interdimensional nonsense". Through the Ω-Files, the player can read about Omega's discovery as an ancient magitek weapon.

Omega pays homage to the boss's previous appearances in the series, being on the same level as the boss in Final Fantasy V and yielding a trophy item, the Omega Badge, when defeated. It being an ancient war machine built to kill gods is also a homage to its origins, but also fits into the story of Solheim.

Battle
Omega is by far the toughest enemy mainly due to its unrivaled defense stats and 99% damage resistance to normal weaponry and elemental magic, except Lightning (20% damage resistance) and Light (absorbs). It is immune to Arcana magic from the Ring of Lucii, and its powerful attacks that even the Magitek Exosuit cannot block can quickly wipe out even a max-level party with endgame equipment.

Omega can be attacked on its legs, head, backside, and antenna. The legs break after receiving some damage, and Omega will temporarily fall into a Vulnerable state once all four of its legs are broken. It sometimes turns around in place to make it harder for the player to attack them. Omega will be immobile while Vulnerable and dealing enough damage to its head in this state makes it pop out, allowing the player to execute a unique Cross-Chain. Attacking Omega's antenna deals double damage, but focusing on it (or its head and backside to a lesser degree) when not Vulnerable will drive it berserk for a limited time. While berserk, Omega will move and attack faster and become immune to royal arms, but loses its 99% resistance to normal weapons.

Omega's attacks are deadly and some are capable of one-shotting the party. It shoots a red laser out of its antenna, blasts a large blue beam from its frontal cannon, fires an explosive blast from its eye that causes Instant Death, exhausts smoke from its back that causes Confusion, launches homing missiles that make the party Enervated, and it can briefly disappear before pouncing on the party.

It drops the Rare Metal accessory when defeated, which gives Noctis a colossal strength boost and allows him to break the damage limit without Armiger Unleashed, but in exchange severely reduces his defense and cuts his maximum HP by 90%.

Strategy
Omega's 99% resistance to normal weapons forces the player to use the royal arms, but even this will take a long time due to its staggering Vitality. Powerful lightning magic, such as Quintcast: Thundaga or Electon, can be used, but they must have very high potency to deal sufficient damage due to Omega's tremendous Spirit and 20% resistance to lightning. It is recommended to set up camp and consume the Scientia-Style Sushi beforehand as it increases the party's Strength and Magic by 75% and makes all attacks critical. Should Ignis not have this recipe, the Royal Banquet Canape and the Golden Tail Soup are decent substitutes.

The player should primarily focus on Omega's legs to break them, but since it is protective of them, the player can also attack its head, backside, and especially its antenna as the latter takes double damage. However, it is best to attack them sparingly, as a continued onslaught on them will drive Omega berserk.

Should Omega become berserk, Noctis should switch to regular weapons as it becomes immune to royal arms. It is recommended to attack from range either with warp-strikes or firearms, as Omega constantly melee-attacks with increased movement speed. Ignis's Overwhelm technique is also viable due to the party members being invincible during its duration.

It would be safer to use the standard Armiger over Armiger Unleashed, as in the latter Noctis can easily fall in the Danger state due to Omega's high damaging attacks. The player should break Omega's legs first to make it Vulnerable, then activate Armiger and focus on attacking its head to make it pop out for a Cross-Chain that can deal up to 99,999 damage if executed perfectly.

If using the higher damage output of Armiger Unleashed despite the risks, it is best to use a mix of Armiger Vortex and Armiger Onslaught as they are the most damaging finishing combo moves. It is recommended to use the Unleashed techniques whenever available as they are devastating and make Noctis invincible for their duration. The Tech Turbocharger accessory can be equipped to hasten the Tech Bar's refill rate so Noctis can use the techniques more often, but after Unleashed runs out, the player can swap it out for the Armiger Accelerator to refill the Armiger bar faster.

An easy (albeit extremely time consuming) way to win is to character-swap to Prompto with The Clever's Talisman equipped (so he has infinite ammo) and position him between buildings so that Omega cannot reach him, then use the Rapidus SMG on Omega's antenna to make it berserk and continue firing on it due to Omega having lost its 99% resistance to firearms.

Musical themes
Once Omega's HP drops below 50%, a new orchestral arrangement of the Final Fantasy V tracks "Battle 1" and "Lenna's Theme" begins to play.