We have 1 cheats and tips on PSP. If you have any cheats or tips for Alien Syndrome please send them in here. We also have cheats for this game on : PC : Wii
You can also ask your question on our Alien Syndrome Questions & Answers page.
Unlock Hard Mode:
Complete the game on the 'Normal' difficulty setting to unlock the Hard difficulty setting.
Unlock Expert Mode:
Complete the game on the 'Hard' difficulty setting to unlock the Expert difficulty setting.