Armored Core Wiki
Infobox Over Boost
General information
Classification Technology
Game mechanic
Appearances Armored Core 2
Armored Core 2: Another Age
Armored Core 3
Silent Line: Armored Core
Armored Core: Nexus
Armored Core: Formula Front
Armored Core: Nine Breaker
Armored Core: Last Raven
Armored Core 4
Armored Core: For Answer

Over Boost (OB) is a Core function that debuted in Armored Core 2. It is a larger, more powerful, burst-type booster mounted in the back of the Armored Core's core. Cores with this function allowed the Armored Core to move high speeds. When activated, plates or panels on the back of the Armored Core will open to reveal the over booster(s), which will charge briefly before explosively accelerating the Armored Core to speeds approaching 900kph (approximately Mach 0.74), depending on the core and the overbooster. This alleviates the problem of the Armored Core's relatively slow (300-500kph) average speed when using standard boost. The drawback of OB is the massive amount of energy drained and possible Overheat when in use.

In Armored Core 4 and Armored Core: For Answer, Over Boost is no longer a Core-specific function, but a general part that can be installed in the AC. As with previous games, they rapidly consume energy, but now also Kojima Particles as well, further limiting their use due to the harm done to defensive capabilities. The consumption of KP is meant to balance out the fact there is no heat system in AC4-era games.



  • In Japanese, it is called Overed Boost.
  • Over Boost was the very first distinct Core function created.
  • In its introduction of Armored Core 2, Over Boost only had the drawback of rapid energy consumption but never generated any heat upon or during usage.
  • Using Over Boost for a short duration is similar to Quick Boosting.
  • Tank legs were equipped with similar auxiliary boosters to help skim the AC across surfaces.
  • The Armored Core V and Verdict Day equivalent is Glide Boost.