Successfully complete the game to unlock another set of missions.
Federation Shield for Austin's Zaku 1
Successfully complete the game, then play practice mission 1 with Austin's Zaku 1. Successfully complete it and you should have a heavy Fed shield like the Gundam's, and a few new supplies.
Lt. Sophie's Beam Rifle
To unlock Lt.Sophie's beam rifle, just increase the number of kills. Note:To make it easier Simulation 1 would be a good idea.
Play as Char Aznable
Get an "S" rank in Simulation Program 1 to unlock Char Aznable.
Play as Garma Zabi
Get an "S" rank in Simulation Program 2 to unlock Garma Zabi.
Unlock Gaia
To unlock Gaia complete Simulation 14 to unlock his moblie suit.
Unlock Kai
To unlock Kai succesfully complete mission 10 round 2 to unlock Kai.
Unlock Lt. Fran's Guntank MP
To obtain Lt. Fran's Guntank MP obtain 50 kills with her GM S-Armor to unlock her Guntank MP.
Unlock Lt. Sophie's Guntank MP
To unlock Lt.Sophie's Guntank MP obtain 50 kills with her RX-79(G) to unlock her Guntank MP.
Unlock Ramba Ral
To unlock Ramba Ral complete Simulation 13 to unlock his mobile suit.
Unlock Sayla
Sucessfully complete 3 Fediration missions with at least A C + to unlock Sayla.