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Full name Isomer
Event type Story
Released on CN, TW, KR, EN, JP

The 2019 winter event of Girls Frontline, Isomer describes the follow up story after story Chapter 11, with Griffin & Kryuger's new task relayed from the Security Bureau by Mr K. The event on CN servers (BiliBili/DSky) starts after the maintenance on 24th of January maintenance, and closes with 28th of February maintenance. The event code name is Isomer. Other Asia servers will start the event on a later date.


"Let's take out the trash."

This article may require cleanup, for the following reason(s):

  • Declare a better summary
  • Write down the plot


Overall difficulty

Both interface and overall gameplay difficulty of Isomer is considered reduced when compared to previous events Continuum Turbulence. Despite the event offers normal and hard difficulty, all of the event rewards (except for additional medals) are obtainable from normal mode. Normal difficulty can be completed with lv80+ 4x expansion T-Doll echelons with decent graded equipment and fairy/HOC back ups.

New elements and mechanics

Linear Timeline with Separate Story Routes

Isomer is scripted by three separate story routes with no dead ends and placed on one continuous timeline. But however players cannot complete one route at a time, all three routes have to be played, if one route is met with a dead end, simply play another.

  • Route 1 (top) is notated as E1, it describes Griffin & Kryuger's story involvement in Isomer, from the Commander, SMG RO635Thumb button.pngRO635  and AR M4 SOPMOD IIThumb button.pngM4 SOPMOD II 's point of view.
  • Route 2 (middle) is notated as E2, describes DEFY's story involvement, from AR ST AR-15Thumb button.pngST AR-15  and AR AN-94Thumb button.pngAN-94 's perspectives.
  • Route 3 (bottom) is notated as E3, protagonists for this route are Angelia, AR M4A1Thumb button.pngM4A1  and AR AK-12Thumb button.pngAK-12 
  • Some nodes are story only, with no fighting requirement, those nodes will not be given a level notation. E2-1 refers to the very first node playable, since it is located on the middle line. E1-3 refers to the third battle chapter on the top route.

Node Locking (Intel Points)

Big orange number indicates available Intel pts, smaller white number indicates available Intel pts today, the number after + symbol indicates accumulated unspent eligible pts

All nodes, both story and battle nodes are locked by default except the first one, completion of battle nodes will yield the amount of Intel pts as displayed on the right side of the node. Nodes with a lock cannot be accessed until they are unlocked with the amount of Intel pts shown on the lock.

A daily cap of total Available Intel pts are in place, likely to prevent players from rushing the event and completing it on one day. The Daily cap sums up to 200, unspent points will be accumulated to the next day, the pool of unspent points does not have a cap and can accumulate indefinitely.

  • When acquiring Intel points, the system will prioritize the fresh daily cap, once the fresh sum is depleted, then the accumulative sum will be used.

Event Currency: Crates

The small symbol below the node shows the crate eligibility
  • Players will be rewarded with crates upon completing event battle maps.
    • The amount varies between nodes, early stage nodes will have lower crate reward while later chapters will have more.
    • Normal difficulty rewards 6-10 crates and Hard difficulty rewards 8-15 crates.
  • Crate reward eligibility is reset everyday at 00:00 am Beijing time.
  • The same node cannot be repeatively farmed for all the eligible crates of that day, a symbol will appear below map nodes which indicate the crate reward eligibility from that node.
  • Crates can be opened for random rewards, interface is located on the main menu -> events.

New Interactive Map Nodes

Few newly added objects on the map nodes can be interacted with and/or has impact on the strategic aspect of the game, listed as following.

Control Station

Control station's icon without and with access
Interactive interface locats to the left
Option for opening a gate, click on T-Doll echelon again to enable closing gate option
Swipe up and down to switch between available options

Icon banner arrow left.png Icon banner arrow right.png

Control stations are placed on certain maps, interacting with them usually triggers another object on the map, such as the opening/closing of a defensive gate.

How to Use
  1. Move T-Doll echelon on top of the node to gain the interface panel. If node had green light, the access to the functions will be readily available, if not player will have to manually gain access to the node.
  2. Once access is granted, select T-Doll echelon again to access interface, swipe up or down to select options.
    • Gates only have one option at a time (close/shut), while artillery platforms is able to be activated/deactivated and command to fire on specified node from the control station.
  3. Players can choose to freeze access (locking it down again), which prevents enemies from accessing it.
  4. Note the node itself does not have to be captured, when using control station.
  5. Usage of a control station does not action points, for example a defensive gate can be opened and closed as many times as the player desires within the same turn.

Defensive Gates

A closed gate blocks access, notice the greyed out routes

Defensive gates controls passage routes, the node under a sealed gate cannot be access by either the player's units nor enemy units. A control station can open the gate, revealing access. Note that any units standing on the gate node will take heavy damage when the gate is shut on them effectively halving their HP every time the gate is shut on them, this will work even on elite/boss units.

Rubble pile

Blockades formed by rubble piles, denying access to both friend and foe, note the greyed out routes

Rubble piles functions similar to a gate, prevents access to the node it's on. Rubble piles can be removed via two means:

  1. Player can destroy them with HOC echelons like other enemy infrastructures.
  2. Player can destroy them with an echelon carrying an abandoned Golyat (see below).
  3. Keep in mind that once a rubble is removed the pathway is permanently open.

Abandoned Golyat

Node with an abandoned Golyat unit
Interactive interface that allows echelon to pick up Golyat
Option for detonating near by rubble

Icon banner arrow left.png Icon banner arrow right.png

Abandoned Sangvis Ferri Golyat units can now be found on certain maps, players can order echelon to pick them up and use them to detonate infrastructures such as rubbles. In addition to rubble destruction, Golyats can be planted and used as an explosive trap on Access bridges.

Access Bridge

Access Bridges work as the opposite of Rubble Piles. Usually a part of a strategic path used by friend and foe alike, players can plant Abandoned Golyats on Access Bridges as mines. The Golyat will severely damage the next unit that uses the bridge and will also destroy the bridge, preventing any further access to the node. However, the unit that triggered the mine can still cross to the other side, so be careful. (This might be a bug.)

New T-Dolls

(Possible T-Doll banner?)

  • MG LewisThumb button.pngLewis  (Reward - Acquired after beating Chapter E2-9)
  • RF KSVKThumb button.pngKSVK  (Reward - Acquired after beating Chapter E1-4)
  • HG HS2000Thumb button.pngHS2000  (Random drop from event crates; one guaranteed HS2000 available in 777th crate opened)
  • HG P22Thumb button.pngP22  (Random drop on certain maps)
  • MG UKM-2000Thumb button.pngUKM-2000  (Random drop on certain maps)
  • SMG X95Thumb button.pngX95  (Random drop on certain maps)
  •  Nian Fairy (Ex map reward)

Event Maps

Below is a link to our strategy guide for the event, applies to all servers. Isomer doesn't possess chapters like most Major Events, instead its seperated by 4 distinct stopping points, which require you to complete all respective routes before being able to progress.



"This is classified information!"

This article contains spoilers. You have been warned.

The story revolves around Angie's DEFY task force, G&K, Russian Federal Security Bureau, The White Faction (Revealed as Paradeus as of this event), Infested ELID creatures and Sangvis Ferri. A global summit held in Belgrade has been attacked by Paradeus forces with the help of local extremist groups. The city's anti-ELID walls have been breached, creating the perfect distraction for Paradeus to carry out their plans within the city. Meanwhile, Sangvis Ferri works from the shadows to prevent precursor technology from falling into the wrong hands, pursued relentlessly by M4A1 and the rest of Task Force DEFY. In the middle of chaos, G&K finds itself embroiled in a desperate fight on multiple fronts to keep the city under control.



  • Isomer is a chemistry phrase, it refers to chemical compounds with the same formula but different structure, resulting in different chemical/interactive behaviour.
    • A one point during the story, a dysfunctioned Nyto called out M4A1 as her twin sister, suggesting the fundamental similarity/differences (Isomerism) between T-Doll M4A1 and the Nyto type combatants, this is likely what the event name Isomer suggests.
  • The ending song is シラカバの光 (Shirakaba no Hikari) performed by AKINO