Robotech: Invasion Cheats

When playing as Tasha (red/brown) You will fall in a cave shortly after
meeting Xed. He'll meet his contact and you will fall into the Three
Stone Landmark. After awhile you'll get get to a room with tons of that
yellowish/green stuff. Shot the little slides to drain the pool then you
will move on.    

When fighting the bigger enemies, aim for the eyes.

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.

Go to the OPTIONS menu, and choose EXTRA. Enter the desired unlock codes:

Password - Effect
DUSTYAYRES - 1 Hit Kill
RECLAMATION - Access to All Levels
SUPERCYC - Invincibility
YLLWFLLW - Lancer's Multiplayer Skin
KIDGLOVES - Rand's Multiplayer Skin
BLUEANGLS - Rook's Multiplayer Skin
LTNTCMDR - Scott Bernard's Multiplayer Skin
TRGRHPY - Unlimited Ammo

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