Bonus missions
 
Collect all brown bonus books during a mission to complete the photograph 
at the end and unlock a bonus mission. Note: The "Saving Private 
Smith" mission has not associated a bonus mission.
 
Level - passwords 
Mission - Normal - Hard - Very Hard 

1 -- XHGDR --- PLKUM --- PVTSL 
2 -- WKUC4 --- JE5SH --- SKDJF 
3 -- YSM51 --- DFY3B --- 3DYNG 
4 -- B7D8F --- K9D3H --- 9BG3S 
5 -- 3GHSL --- NMWQ9 --- KJWJK 
6 -- AZLM1 --- 16G3L --- E2J7H 
7 -- JAHSG --- WL3CZ --- ZX78Y 
8 -- UN63A --- LPQ6T --- TRIB4 
9 -- VAZ2P --- SRCM8 --- TRD78 
10-- 9TT5W --- PAEN8 --- 1LPQD