Super Robot Wars/30/Secrets

Confirmed

Lancelot Albion Zero & Early Suzaku

During the Mission "Zilkhstan's Darkness", defeat Nagid Shu Mane with Kallen before it retreats. Suzaku will join with the Lancelot Albion Zero after the stage.

Full Armor Gundam Mk-II

Quattro's must have a score of 20+ at the beginning of "Augusta Remembrances/A Sign."
During the mission, "Augusta Remembrances/A Sign," Jona must defeat 3 units before the end of turn 2.
If the criteria have been satisfied, Kamille will sortie in the Full Armor Gundam Mk-II.
Otherwise, the Full Armor option parts can still be obtained by completing the mission "Alone in the Wild".

"Alone in the Wild" lowered score requirement

Play "The Man They Called Newtype/The White Comet's Contrails". If Amuro destroys 4+ enemies in that mission, the score requirement to unlock "Alone in the Wild" will be lowered from 60 to 30.

Kagero

1. During the Mission "Mutual Trust", defeat Kagero with Shadow-Maru, then defeat Kagero a second time with either Shadow-Maru, J-Decker or Build Tiger.
2. Gridman, J-Decker and Build Tiger must get a combined score of 80+ to unlock the mission "Seven Officers". Complete that mission before playing "Brave Spirits".
3. Complete the mission "Return of the Mirage".

Leccee's Appearance

During the Mission "Cross Point", a dialogue choice before entering the map will change how Leccee looks.
1. "No way Leccee should change" - Short hair, purple outfit
2. "I can see Leccee's new look" - Long Hair, blue outfit

2nd V2 Gundam

Complete the mission "New Wings" before completing the mission "A Flash Through Space".

Yuta's early upgrade

Duke Fire must have a score of 60+ in the mission "Blazing Combination" before the event to combine into Fire J-Decker. If this requirement is not met, Yuta will instead be improved in "The Angels Ascend" / "To a Future Filled With Light"

Supporter Boss, Nuke and Mucha

During the mission "Life of a Mazin", Koji must destroy at least 2 units after the Majin Power event.

Tatra & Tarta, Aska & Giant Sang Yung, and Early Clef and Cephirans

Complete the missions "Chizetan Storm" and "Imperial Princess" before completing the mission "A World In Turmoil".
Supporter: Tatra & Tarta, and Giant Sang Yung (Aska, Sang Yung) will join during "A World in Turmoil".
Supporter: Clef and Cephirans can be obtained early in "Dark Invitation" if conditions are met. Otherwise they will join the team in "Heart to Heart" / "To a Future Filled With Light" wether the conditions were met or not.

Nei Moh Han & Auge

Partially confirmed: Score requirement confirmed, other 5 objectives remain unconfirmed
By the end of the mission "Picaresque", Daba must have a score of 100+ or complete all of the following conditions:

• On the mission "Contact Pentagona", defeat Nei with Daba.
• On the mission "Lady Lady", fight Nei with Daba.
• On the mission "Cross Point", fight Nei with Daba.
• On the mission "Escape Giwaza", defeat Nei with Daba or Leccee.
• On the mission "Picaresque", defeat Gablae with Daba.

If either the score requirement is met, or the other 5 requirements, the mission "My Love" will unlock. Complete it to get Nei and the Auge. You will also unlock Gablae and the Ashura Temple early.

True Ending

At several points in the game, Caruleum Vaull (the OG antagonist with the horns) will ask Mitsuba a moral question; once you answer, he'll tell you if your answer tipped the scales left or right.

• Mission "A Towering Light": Answer "Let the billion die." to gain +1 Left points
• Mission "A Purified Land": Answer "Take the life of others." to gain +1 Left points
• Mission "Preordained Destiny" or "Where It All Leads": Answer "Treat the clone as different." to gain +1 Left points
• Mission "A World in Turmoil": Answer "Make key crew members exempt." to gain +1 Left points
• Mission "Arbitrator": Answer "Take fate into my own hands." to gain +1 Left points

If you have answered more left than right, you will take the True Ending Route. Otherwise, you will take the Normal Ending Route.
On a New Game Plus, in the introduction of the mission "Judgment", you will instead be given a choice (regardless of point count):

• Answer "The Earthlings must be eliminated by the Quaestors." to take the True Ending Route
• Answer "The Quaestors must repair their faults." to take the Normal Ending Route

Supporter Sakura

In the mission "Judgment", the following requirements must be met.

• 1) Hinoki and Keita must be piloting the Kakuseijin V2.
• 2) Defeat Conqueror King Genesic (Triple Zero) with either GaoGaiGar, GaoGaiGo, GaoFighGar or Kakuseijin V2
  

She will join once "Future at Stake -VERSUS-" is concluded

Lamia & Betterman Cataphract

During the mission "Future at Stake -VERSUS-", defeat Betterman Cataphract with Guy. He will join after the stage is completed.

Supporter Nora

During the mission "Heaven & World", either defeat Wyver (Dorotheo) with Ernie, or Ernie must have a score of 100+ by the end of the mission. Nora will join once the stage is completed.

Quwasan Olibee & Calvary Temple

Complete at least one of the following requirements:

• During mission "Escape Giwaza" have Daba use the "Talk" command next to Olibee.
• Daba must have a score of 150+ before starting "The Dictator" or "Dreamers Forever".

If either conditions is completed, Olibee will join your team during "The Dictator" or "Dreamers Forever" when Posaydal appears.

Saudade of Sunday (Michael Garret) & Dahlia of Wednesday (Fasalina)

Michael points:

• On the mission "Towering Light", defeat Gadved with Van. (+1 point)
• On the mission "World in Turmoil", defeat Fasalina with Van. (+1 point)
• On the mission "The Meaning of Happiness", defeat Michael with Van. (+1 point)

If you have 2+ Michael points, on the mission "Endless Dream", defeat Birthday (Claw) with either Van or Ray.
If the previous requirement is met, the secret mission "A Dish Best Served Cold" will be available once you complete either "The Angels Ascend" or "To a Future Filled With Light". Play it to recruit Michael and Fasalina

Improved Mokona

Hikaru, Umi, and Fuu must have a combined score of 150+ before starting the mission "Heart to Heart" or "To a Future Filled With Light".

Victim

During mission "Heart to Heart" or "To a Future Filled With Light", Victim must fight Big Mother at least once . Big Mother must be defeated by either one of these robots : Victim, Fire J-Decker, Super Build Tiger, Shadow-Maru.

Supporter Akane

Akane points:

• On the mission "Awakening" / "Destruction", defeat Devadadan with Gridman (+1 point).
• On the misson "7 Officers", defeat Anti with anyone (+1 point) or defeat Anti with Gridman (+2 point).
• Complete mission "Melancholy" (+1 point).
• Complete mission "What the Heart Dictates" (+1 point).
• On the mission "Creation" / "Awakening", defeat Zegga with either Gridman or Gridknight (+2 points).

On the mission "Creation" / "Awakening", if you have 4+ Akane points by the time Alexis Kerib appears, defeat him with Gridman. Akane will join as a supporter once the mission is completed.

Katejina & Cronicle

Katejina points:

• On Earth Route "Warriors of the League Militaire" / "Encounter in Space", defeat Cronicle with Üso (+1 point). Defeat Lupe with Üso (+1 point).
• On Space Route "League Militaire" / "A Voice Calling in Space", defeat Katejina with Üso (+1 point).
• On Space Route "Free-For-All", defeat Lupe with Üso (+1 point).
• On the mission "New Wings", fight Katejina with Üso (+1 point). Defeat Katejina with Üso (+1 point).
• On the mission "Infiltrating Zanscare", fight Katejina with Üso (+1 point). Defeat Katejina with Üso (+1 point).
• On the mission "The Red Comet's Duty", defeat Cronicle before before the Dreisstrager arrives (+2 points).
• On the mission "What Follows Myth", defeat Katejina. (+1 point)

If you have 4+ Katejina points, on the mission "The Angels Ascend" / "Above the Angel's Halo", do the following steps in that order:

• 1) Defeat Zoltan while Cronicle and Katejina are still present.
• 2) Defeat Katejina with Üso while Cronicle is still alive.

On mission "Doorway to the Abyss", select "I can sense Katejina!".

DLC 1 Secrets

Combination Attack Power

The Attack Power of the combination attacks "Together in the Cherry Blossoms" and "Hallelujah" depends on your answer to a question asked at the beginning of the mission "Parisian Cherry Blossoms" :

• If you choose "Sakura, are you safe?!", "Together in the Cherry Blossoms" will have a base power of 7,500, "Hallelujah" will have a base power of 7,000.
• If you choose "Erica, are you okay?!" will make "Together in the Cherry Blossoms" will have a base power of 7,000, "Hallelujah" will have a base power of 7,500.
• If you choose "It's nice to see you two getting along." both attacks will have a base power of 7,200.

The Attack Power of the combination attacks "Knock Our Future Out of the Park" depends on your answer to a question asked at the end of the mission "Skyline Samurai" :

• If you choose "Of course. Gemini is important to me." the attack will a base power of 7,600.
• Otherwise the attack will a base power of 7,100.

Unconfirmed

Caruleum

• Obtain the True Ending route.
• On the stage "Doorway to the Abyss", defeat Caruleum with the protagonist. He will offer to join the team. If you defeat him with everybody else, he will join automatically.
• On NG+, he will ask regardless of who defeats him.