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Enter the following codes with all 5 marines still alive to unlock the corresponding level.
Level 2 - BP100280D
Level 3 - BP1JL9J0C
Level 4 - BP20Q9J08
Level 5 - BP2J49J01
Level 6 - BP30N9J0F
Level 7 - BP3JJ9J0H
Level 8 - BP40V9J0B
Level 9 - BP4J49J02
Level 10 - BP50Q9J0F
Level 11 - BP5JD9J0F
Level 12 - BP60VRS0B
Level 13a - BP1JSRS0W
Level 13b - BP202RS0S
Level 13c - BP2JNRS0Q
Level Passwords:
2=BP10D2808
3=BP1JZ9J07
4=BP20B9J04
5=8N2JJ9S07
6=8N3J0B007
7=8N3J0B003
8=8N40JB001
9=8N4J6B001
10=8N504B007
11=8N5JLC801
12=8N60DTJ0H
13=8N1JLTJ0L
14=8N20NTJOM
15=8N2J6TS0M