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OptPassive1.png [Passive] Improve the G-Core and strengthens the system.

Each time the G Skill transforms, Attack Power increases and the current G Skill's cooldown time is reduced. (Max 5 stacks possible)

All speeds are increased with the influence of the ugraded G-Core.

[Auto-gun]'s function in upgraded.


Class Level Required
Optimus 35

Skill Information

All Speed
Auto Guns Enhancement G Core Transform
Range Increase MP Gain Increase ECP Cost Increase Ricochet Bullet
G-Extension G Skill Cooldown G Core Standby Duration
Attack Increase Duration Max Stacks
1 35 3% 5% 5% 20% 10% 3% 10 Seconds 5 1 Second 30 Seconds
2 51 4% 10% 10% 30% 15% 4%
3 59 5% 15% 15% 50% 20% 5%
4 93 6% 20% 20% 60% 25% 6%

Affected Combos

Jamming Metal Heart Optimus Prime Operator
AGIcon.pngXXXXXX ZZZX(XxxxxX) (>>^X)ZZ (>>X)ZX
AGIcon.png>>X (XX)vX (>>^X)ZXXX
AGIcon.png^X (>>X)XXHold

Related Skills

OptPassive3.png G-Mastery
Lock.gifLv60Book.png Camilla's Secret Manual (Expert) is needed to unlock this skill, available through the Expert Training Skill Quest or Item Mall.
Prime Operator - Passive 2.png G-Upgrade

Tips and Details

  • Transforming between G-Skill Mode system puts every currently equipped G-Skill on a 1-second cooldown, except the one that is being transformed to, which can be cast immediately upon transforming.
  • This passive is affected by G-Upgrade.


Date Changes
03/24/2016 07/27/2016
  • G-Extension added.
04/07/2016 -
  • Buff's expression improved.
11/03/2016 11/23/2016
  • Auto Guns Range Increase decreased.
  • Auto Guns MP Gain Increase decreased.
  • Attack Increase error fixed.
04/27/2017 -
  • All Speed Increase decreased.
  • Auto Guns Range Increase decreased.
  • Auto Guns MP Gain Increase decreased.
  • Attack Increase decreased.
08/23/2018 09/06/2018
  • Attack Increase increased.
09/20/2018 10/11/2018
  • Can be renewed at max stack.

Alternative Names

Server Name Translation
Korean Flag.png South Korea G-익스텐션 G-Extension
Chinese Flag.png China (Simplified Chinese) G-扩展 G-Extension

Optimus Skills
Hyper Active
OptHA.png Mecha Volt MX
Special Active
OptSActive1.png G-0 Battleroid     OptSActive2.png G-1 Corona     OptSActive3.png G-4 Frisbee     OptSActive4.png G-2 Rolling Thunder     MagneticGenerator.png Magnetic Generator
OptActive1.png Magnetic Guard     OptActive2.png G-3 Raptor
OptPassive1.png G-Extension     OptPassive2.png Mecha Generator     OptPassive3.png G-Mastery