Another Century's Episode/Secrets

Free Mission

Complete the Story Mode once to unlock free mission as well as two extra missions playable from there.

Secret Units by Series

Aura Battler Dunbine

Billbine (Camouflage Color)

Sortie with 12 or more different units

Zwarth

Complete 30 secret objectives

Martian Successor Nadesico: The Prince of Darkness

Alstroemeria

Complete 5 secret objectives

Heavy Metal L-Gaim

Amon Duule “Stack”

Obtain "Ace" rank on 16 missions

Ashura Temple

Complete 15 secret objectives

Aug

Complete 40 secret objectives

Brain Powerd

Yuu Brain

Complete Story mode once

Baronz

Complete 35 secret objectives

Metal Armor Dragonar

Gilgazamune

Complete 45 secret objectives

Blue Comet SPT Layzner

Zakaal

Complete extra mission 1 (Earth)

Mobile Suit Zeta Gundam

Baund Doc

Complete 25 secret objectives

Quebeley

Complete story mode once

Mobile Suit Gundam: Char's Counterattack

Sazabi

Complete extra mission 2 (Space)

New Mobile Report Gundam Wing

Tallgeese

Sortie with 25 or more different units

Gundam Epyon

Obtain "Ace" rank on 32 missions