Easter Egg: Jack Archer Lives
After you beat the game, use the unlock all levels code and start a new game and
select the Bygone Marshes (or just start a new game without the code and get to
that level).

Turn around at the very start and there is a long area that you can drive
through. So, drive through the pillars until you get to the last two sets of
pillars. On one of them (facing north-east [use your compas]) there is
vandalism that says, "Jack Archer Lives!!"

If you shoot that paritcular sign, a health pack will drop, followed by
protoculture, then a Holden Mark-2 Shotgun. There's one more item that comes
out, but you have to keep shooting the sign until it does. If you do, you'll get
a soccer ball. You can shoot it with the shotgun to make it bounce all over and
test out the Havok physics engine.


Cheat List
To unlock the extras go to options and select extras and enter codes:
Unlock Scott Bernards Cyclone (Multiplayer): LTNTCMDR
Unlock Rook Bartleys Cyclone (Multiplayer): BLUEANGLS
Unlock Lancers Cyclone (Multiplayer): YLLWFLLW
Unlock Rands Cyclone (Multiplayer): KIDGLOVES
Invincibility (Single Player Only): SUPERCYC
Unlimmited Ammo (Single Player Only): TRGRHPY
Unlock All Levels (Single Player Only): RECLAMATION
One Hit Kills (Single Player Only): DUSTYAYRES
Note All Passwords Are Case Sensitive.

PS2 Cheats for Robotech: Invasion

Robotech: Invasion cheat codes

Robotech: Invasion cheats