CheatCodes.com has all the official Alien Trilogy PSX cheats to unlock everything. If you know of any that we don't have, please let us know.
All published and official codes as of Tuesday June 18, 2013 for Alien Trilogy are shown below.
Enter "FLYTO35" as a password.
Pause the game and press Triangle, Circle(2), Square.
Enter "1GOTP1NK8CIDBOOTSON" as a password. Then, all weapons, infinite ammunition, invincibility, and access to all levels will be available. A new option on the title screen will allow the display to be toggled between NTSC and PAL. Note: Saving the game to a memory card will only save weapons and ammunition.
Enter "G0LVLxx", where xx corresponds to the number of the desired level, as a password. For example, enter "G0LVL14" for level 14. If you entered the code correctly, the phrase "Cheat Activated" will appear after the "Accept" option is selected. Then, select the "Quit" option and start the game with just the pistol. Note: Starting at level 34 will display the ending sequence.
Enter one of the following passwords to begin a game at the corresponding level on the Xenomania difficulty setting: Level Password 1-2 J3BBBBBBDWP8903BBBBBBBBMBBBXJBBB 1-3 LZBBBBBKCPB9N3DBBBCGBBMBBCD1BBB 1-4 FBBBBBBBMCPB9XLDBBBFBBBMBBCX1BBB 1-5 7LBB7BBB84PB9K3GBBBDLBLMBBDB1BBB 1-6 1LBBBBBB6WPB7F3GBBBJ2BBBBBDX1BBB 1-7 YGBJLBBB70PB9R3CQVCBG9BBDBQFJ9CLB 1-8 WGBBBBBB0HPBJLBLL3BTGBLMBVFX9DVB 1-9 XQBJLBBBMHPBJNVFQVBTGBLMCBGD9HBB 1-1 04BBBGBBBFWPBQHLPN2BTLBLJCGG29FBB 1-11 3ZBJLBBB4HPBQQ3PQVBTLBLJCGHJ9FBB 1-12 03BJGBBBHWPB9BB0H3BTLBLDCBHZ9GVB 2-1 Z3BBSBBB74PB9GVTJVBBBBBDB7JG9BVB 2-2 4BBLGBBBB8PB91B4PVBBBBBMB3JZ9C3B 2-3 4GBKVBBBZRPB9BB5QVBBBBBKCGKG9GLB 2-4 2BBQGBBBSRPBBBBB5BBBBBBBBBBKZ9GVB 2-5 0ZBBBBBD9V8PB9QWDHBBTLBLBCGLH9G3G 2-6 03BQVBD9VHPB9QWJM7BTLBLGCGL09HBD 2-7 1LBHXBD354PBJBCLPQBTBBLBB3MH9HBD 2-8 RQBBBBD988PBJCCVDBBTBBLBBVM09CBH 2-9 4BBQVBFGX4PBJJMVQGBTLBLBCGNH9FVK 2-10 77BQVBDMYMPBJ24XPQBRLBLBBZNY9HBD 3-1 8ZBCLBC8RMPBDKMPB3BS1BLBB3PF9HBF 3-2 H7BBBBCSFRPB9DWLP3BC7BBLBLP09GVB 3-3 NQBBBBCSLMPBQHCLP3BC7BBLBQQH9GVB 3-4 0GBBBBFGK8PBLH4KK2BBBBBLB7Q09CBC 3-5 KBBBBBFGCWPBLH4KJVBBBBBLB3RH9B3C 3-6 KVBBBBBRL0PB9BBBCLBSQBBMB3R099CLB 3-7 03BBBBBB8CPB9BBXDQBSQBBMCBSK9CLB 3-8 WVBBBBBBY8PB9BBXL33BN3BLMB7509CBB 3-9 TQBBBBBB4MP9P3BDQBBBBBMCGTH9BBB 3-10 4VBJLBFGDMP89XVNQVBJLBBMCBT49F3J 3-11 4VBFNBCSZ4PB94BNF7BQVBBMB7VH9F3J 3-12 S3BBBBFGS0PB94BNKZBQVBBMBZV09HBL 3-13 Q3BQVBDXRCPB94BNQVBTLBLMBGWH9GBL
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