Original URL: http://www.psxextreme.com/ps2-cheat-print/476.html
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Unlock BFG weapon in 1st mission
If you pre-ordered the game, you received a card with a code printed on it that would let you use the BFG weapon in the 1st mission. Here are the codes for those who didn't pre-order.

Enter any of these as your name in the profile screen. Make sure to input the - symbol as shown. If done correctly, you'll get to enter your actual name after the code.

9NDH-293Y-P6MJ-829Q
8PPV-J8SY-KA8T-BPYK
G68Y-X5LB-N8PE-9D7N
5Q9E-4SEK-FJVV-C5HV
HQ6G-ZP3B-C5LE-WMXA
EG4P-ZGUJ-6SQJ-3X68
6DEG-7W3X-RKJF-TDF4
3K67-9J5G-NSQH-G49M
3ZEQ-JXH9-TR2H-Y87D
FG6S-WFZG-7MDP-PZGT