Unlock Expert Difficulty:
Finish the entire game on Hard mode to unlock the Expert difficulty level.
Unlock Hard Difficulty:
Finish the entire game on Normal mode to unlock the Hard difficulty level.
Best character:
Play as Seal. He is the best character and he have a laser weapons with
unlimited ammo.
Latest cheat codes for Alien Syndrome at Cheatserver.com
More Alien Syndrome cheats at Cheatbeast
Note: Not all cheat has been tested or confirmed. If this cheat doesn't work, please click on
"Submit cheat" and send your modification.
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Sony PSP cheats
