Ultimate Weapons (abbreviated as UW), known in Japan as "Overed Weapons") are an special class of weapon in Armored Core V.
The most powerful armament class in the game, Overed Weapons are special weapons intentionally built to ignore an Armored Core's original scale and limits. UWs can only be used once in every mission and cannot be used with bay units at the same time. Once UWs are activated the generator of the AC will also disable its limiter, pushing its output to dangerously high levels. This gives the AC almost an infinite EN and enables the charging of the UWs (charge speed depends on the weapon's charge capacity, generator's critical output, and the core unit's EN trasmitting efficiency).
When an Overed Weapon is triggered, a timer will begin, during which the player must use the weapon as much as they can before the countdown ends. During the activation of an Overed Weapon, the AC's main system will say that it does not recognize the unit, and will warn the player to stop using it. . Their power output will generate extensive stress on the Core, gradually damaging the mech over time. The damage attained from Overed Weapon use can be limited by a core unit with a high heat tolerance. While using an Ultimate weapon, the screen will distort, with the exception of your AP and the overed weapon charge meter.
Note: During the warning your mech might lose an arm to the UW, this will make you signifigantly lighter but will reduce how effective you are during combat.
Lastly, all Ultimate Weapons will temporarily store all weapon types in their own specialized Bay Unit with exceptions of Cannon-type weapons (colloquially known as Kneel/Zoom Weapons) that must be purged. A notable exception is the Grind Blade (see below). There are Five Ultimate Weapons in the game, each having their own unique usage and power.
- Main article: Grind Blade
First introduced in the reveal trailer of Armored Core V, the Grind Blade is a massive rotating gear formed by six chainsaws. A powerful melee weapon, once charged and released, the player's AC will lunge forward while the blades are spinning, and its target will be destroyed (around 90000 damage).
It is the fastest UW to use, but using it will also result in the purging of the entire left arm unit (including the shoulder weapon if it is housed in it). Leaving the AC with only its right arm weapon after the grind blade shuts down. This weapon is obtained after finishing all the story missions.
- Main article: Mass Blade
The Mass Blade is not actually a blade. It's a massive pillar made of cement and steel I-beams like those found in modern day construction sites. However it is outfited with huge boosters which gives it a very intimidating look. It is as powerful as it looks, having the highest attack power in the entire game (around 150000 damage).
Once activated a pair of clamps will hold both the arm weapons while the AC wields the Ultimate Weapon. Once charged and used, the AC wielding the weapon will make a very long lunge, before its torso spins a full 360, along with the right arm unit (which holds the weapon) and the boosters on the weapon itself activate, brutally swinging the weapon and smashing anything unfortunate enough to be in its path. The weapon features a homing ability for fully locked-on enemies, and with lowest EN charge cost and second longest active time, it can be potentially fired as much as three times in a row. The weapon is obtained by completing the story missions or the Heavy Assault pre-order weapon pack.
- Main article: Giga Cannon
The Giga Cannon (Huge Cannon in Japan) is a powerful ranged overed weapon. Once activated a pair of clamps will hold the AC's arm weapon, freeing both hands to use the cannon. The AC retains mobility until you start to charge the weapon, which will force it to remain stationary until the weapon discharge or the charge is canceled. Note that the weapon has no scope or lock on capability. The user must rely on manual aiming. Once fired it will create a huge explosion that does massive splash damage (around 80000 in the center). This weapon is obtained after completing all story missions or by downloading the Recon Pack.
- Main article: Legion Pulse
The Legion Pulse (Multiple Pulse in Japan) is a strange looking Ultimate Weapon. Once activated a pair of clamps will hold the arm weapons and freeing the AC's frame to use it. The weapon is then moved to both sides of the AC and opens in a fan fashion, covering a full 360 degree field of fire.
Once released the weapon shoots pulse and plasma balls in a small area around the AC, destroying everything caught in it (around 60000 damage). However the pulse only has an activation time of 20 seconds; the shortest in all ultimate weapons; and even the best fitted AC can only fire the weapon once, while some AC poorly fitted for the ultimate weapon will find their timer running out before the weapon fully charges. This weapon is obtained after finishing every story mission and order mission or with the Heavy Assault pre-order pack.
- Main article: GIGA MISSILE
The Giga Missile (Huge Missile in Japan), as the name suggests, is a huge missile. It is fired from a vertical launch position. Once it starts charging the player must remain stationary. The missile has lock on capability but can only lock on to targets visible to the user, unless a flare gun is used on an enemy AC, then the user can lock in to the target whether it is in cover or not.
Once landed the huge missile creates an even larger explosion and does splash damage (around 100000 Damage at ground zero). The destructive power and explosion radius is such that there has been documented cases of the weapon killing two ACs at once. It is the last overed weapon the player obtains after triggering conditional Zodiac AC encounters during Story Missions. It can also be obtained with the Heavy Assault weapon pack.