Operation Cube Plus

Operation Cube Plus ( 魔方行动+ ) is a time limited operation in Girls Frontline from March 30^th GMT+8 to April 20^th GMT+8 2017. It is an upgrade to last year's summer Operation Cube, with additional maps and more challenging boss fights. The core mechanics remain mostly the same: the entirety of the operation is night combat, which means Handgun T-Dolls and T-Dolls with high accuracy and/or the ability to equip Armor-piercing Ammo or Night Vision will be highly recommended.

Operation Cube

Main Article: Operation Cube

Operation Cube is a re-released map from last year's special operation of the same name with an update mechanics for E1-4 boss Ouroboros. For detailed walkthrough, see discussion for more information.

Blindfolded Rules

Blindfolded Rules is the second chapter for Operation Cube Plus. It contains four night combat maps for player to complete.

E2-1: Cross Foundation

Possible Hunter Elite spawn point, marked in yellow.

Route for searching Hunter Elite.

Objective: Eliminate Boss Hunter Elite in 8 rounds. Clear map for 3 times to get reward: x200.

Hunter Elite stats:

Health - 20000

DMG - 160

Rof - 60

Accuracy - 60

Evasion - 10

Armor - 30

Recommended echelon compositions: 2 standard RF+HG team for boss fight. If you could not muster two echelons for boss fight, it is recommended to focus your strength in one echelon and forgo the right route since Hunter Elite is more likely to spawn on the left side of the map.
Strategy:

Deploy 2 echelons
Follow the route marked in yellow to search for Hunter Elite.
If your echelons are strong enough, you can simply take down the Jupiter Canon on the left of the landing zone to cut the detour.

E2-2: Dislocation Prediction

Possible Executioner Elite spawn point, marked in yellow.

Route for searching Executioner Elite.#1

Route for searching Executioner Elite.#2

Objective: Eliminate Boss Executioner Elite in 5 rounds. Clear map for 5 times to get reward: Dorm furniture Night Cube

Executioner Elite stats:

Health - 30000

DMG - 180

RoF - 50

Accuracy - 70

Evasion - 15

Armor - 35

Recommended echelon compositions: 1 MG team for mob fight, 1 standard RF+HG team for boss fight. You will encounter Tarantulas on route, so make your MGs ready.
Boss mechanics:

Similar to Ouroboros, Executioner Elite in this map has a special attack called Excution Hybird Attack, which she will jump up to launch a massive attack on your echelon, hit tiles 65741(in numpad notation) in this order. The cut-in is fairly quick, so it is hard to evade once she jumps, it is best to move fragile T-dolls (like your dps) out of the way beforehand.
Executioner Elite will launch this attack at 75%, 50% and 25% of health, and she's invincible during the attack and a few seconds afterwards.
Other than her special attack, Executioner Elite will hit T-dolls in a row with her normal attack. Her target won't change unless the targeted T-doll is offline or retreat. Targeted T-doll could be put into a separate row if you want to reduce overall damage.

Strategy:

Deploy your echelons, take the radar station on the left side of the airport.
Check following scenarios:
- If Executioner Elite spawns on the left top corner, she should appear in your sight now.
- If she doesn't, check the point marked in red circle to see if it's occupied. If so, and you can see a Nemeum on you top right, then she's spawned on the right top corner. Follow the route marked in yellow shown in #1
- If neither above scenarios happen, then she's spawned on the left bottom corner. Follow the route marked in yellow shown in #2

E2-3: Directional Algorithm

Architect will only spawn in the point marked in yellow.

Take down the power-downed Jupiter Canon to take the radar station

Takd the airport either bottom or top of the radar station, and deploy your boss fight team here.

Objective: Eliminate Boss Architect in 8 rounds. Clear map for 8 times to get reward: x200

Architect stats:

Health - 36000

DMG - 200

RoF - 50

Accuracy - 100

Evasion - 30

Armor - 35

Boss mechanics:

Yes, she got invincible skill cut-in too. She will launch her Archit Missile Launch, which has two modes selected in random: one will hit the entirety of the battlefield and the other will be a cruciform hit. Either way, the T-doll in the centre will take the most damage. You could close the game then reboot for re-roll if she keep using the first mode.
Architect will launch this attack at 50% and 25% of her health, and she's invincible during the attack and a few seconds afterwards. T-dolls could be moved to evade her special attack.
Her normal attacks are AOE as well. The easy way to reduce overall damage will be to re-arrange your T-dolls after battle has begun. Her normal attacks cannot be avoid by moving T-dolls.
Her attack range is very long. That could be exploited by retreating her targeted T-doll so Architect will keep targeting her even when she's long gone.

Recommended echelon compositions: 1 MG team for mob fight, 1 RF+HG team for boss fight. 2 team of your choice for taking points.
Strategy:

Deploy one of your point-taking echelon on the top left corner of the map, then deploy your MG team south of it.
The point marked in red circle has a high possibility to be a powered-down Jupiter Canon. If so, take it down with your MG team, then move it to the radar station. If not, keep searching southwards till you find one, or forfeit the game to start anew.
Move your MG team along the route marked in yellow to take the airport. If you see an functioning Jupiter Canon along the way, take the route marked in red and take the airport on top. Either way, it is recommended to deploy one more point-taking echelon back at the start of the map.
Deploy your boss fight echelon in occupied airport, move it alongside with your MG team to avoid any damage to it. March towards Architect's spawn point to search for her. Bypass any functioning Jupiter Canon on your way.

E2-4: Reversal Sequence

E2-4 Map Layout

Ouroboros's turn 2 possible location #1

Ouroboros's turn 2 possible location #2

Recommended path for location #1 and #2

Objective: Eliminate Boss Ouroboros Elite in 8 rounds. Clear map for 8 times to get reward: Grifon Elite Medal x 1

Ouroboros Elite stats:

Health - 40000

Damage - 200

Rate of Fire - 65

Accuracy - 80

Evasion - 35

Armor - 40

Recommended echelon compositions: 2 MG teams + RF+HF boss team (Lv.90+). RFs with high damage multiplier skills(e.g. M99, NTW-20, SV-98, OTs-44) and HGs with firepower tile effects + skills (e.g. Grizzly MkV, Mk23, Colt Revolver, Serdyukov, Bren Ten) are highly recommended, as they are capable of defeating Ouroboros in one skill rotation, before she even gets to use her cut-in.

Strategy:

Deploy an echelon and move it south of the starting landing zone.
Deploy another echelon on the starting landing zone to defend it and end the turn.
At the beginning of the next turn, check if:
- The nodes forming a triangular shape on the west edge of the map have all turned red, or
- The neutral node between a random event node and landing zone has turned red
If any of the conditions in step 3 apply, proceed to these nodes by going south and curving around the Jupiter Cannon to reach the boss. Open up a path with a MG team before using the RF team to fight the boss.
- If none of these conditions apply, the location of Ouroboros cannot be confirmed and it is highly advisable to abort mission and retry. Deploy another fodder echelon and retreat the other echelons through the landing zone before doing to reduce ammo/ration loss.
During the fight with Ouroboros, try to avoid losing HGs before RFs use their skills to secure a quick victory:
- As soon as the battle starts, Ouroboros will target one of HGs, and since she does not have a range limit, she will continue shooting that T-Dolls until she is defeated or retreated. Quickly move another HG in front of her to minimize the damage she will take to maximize her chances of survival;
- Shortly after Ouroboros will start using her missile attacks to hit the T-Doll closest to her frequently. Be sure to rotate T-Dolls on low heath out of front row to ensure that all HG T-Dolls are alive;
- After 15 seconds in, both HG and RF T-Dolls' skills should be ready to use. The concentrated damage from these skills are enough to defeat instantly if the Both the T-Doll and skill levels are high enough. If not, be prepared for Ouroboro's cut-in attack which also makes her invincible for a short amount of time (even after her special attack is finished). Find a time when she is not invincible and use RFs' skills to defeat her.

Rewards

Clear limited event maps in order to obtain the following rewards:

E1-1: 16LAB Infrared
E1-2: ^HG SPP-1SPP-1SPP-1
E1-3: 16Lab Sub-Caliber Armor-Piercing Rounds
E1-4: ^AR OTs-14OTs-14OTs-14
E2-1: x200
E2-2: Dorm furniture "Night Cube"
E2-3: x200
E2-4: Medal

Following T-Dolls can be obtained as drop from certain maps:

Map	E1-2	E1-3	E1-4	E2-3	E2-4
^AR ARX-160ARX-160ARX-160	✘	✔	✔	✔	✔
^HG SerdyukovSerdyukovSerdyukov	✔	✔	✘	✔	✔
^RF PSG-1PSG-1PSG-1	✘	✘	✔	✔	✔
^HG Five-seveNFive-seveNFive-seveN	✘	✘	✔	✔	✔
^MG RPDRPDRPD	✘	✔	✔	✔	✔
^SMG Z-62Z-62Z-62	✔	✔	✔	✘	✔

Either boss or mob fights could drop above T-Dolls, as well as Map Clearing. Be noted mobs repopulated from airport NEVER drops T-doll.

Following exclusive equipment can be obtained from a certain map as a drop:

Match Grade Armor-Piercing Ammo from E2-1
Titan Fire Control Chip from E2-1
.300BLK High-Velocity Ammo from E2-2
GSG UX Exoskeleton from E2-2
Hayha Memory Chip from E2-2

It is unclear as for now whether mob fights will drop exclusive equipment.

Travia

Some name for map of this operation is actual term for Cube Puzzle.