Simply complete the Story Mode to unlock Free Missions Mode in the main menu. This will allow you to play any mission available in Story Mode, as well as two additional Extra Missions.
Complete the indicated task to unlock the corresponding mech.
| Unlockable: | How to Unlock: |
| Alstromeria | Unlock 5 secrets. |
| Amonduel Stack | Get an "Ace" rank with the same mech on ten levels. |
| Ashura Temple | Unlock 15 secrets. |
| Auge | Unlock 40 secrets. |
| Baronzu | Unlock 35 secrets. |
| Bound Dock | Unlock 25 secrets. |
| Gilgazamne | Unlock 45 secrets. |
| Green Bilbine | Use five different mechs to complete the same level. |
| Gundam Epyon | Get an "Ace" with the same mech on thirty levels. |
| Quebeley | Successfully complete Story mode. |
| Sazabi | Successfully complete the Space Extra mission. |
| Tallgeese | Use 25 different mechs to complete the same level. |
| Yuu Brain | Successfully complete Story mode. |
| Zakarl | Successfully complete the Earth Extra mission. |
| Zwarth | Unlock 30 secrets. |
