Put the passwords in the options and highlight number 6(all numbers flashing). Then, enter the password. Note: These passwords are set on the Normal difficulty and have only 1 credit from mission 6 and onwards.

Effect	Password
Mission 10	3BQH
Mission 11	4BQJ
Mission 12	5BQK
Mission 2	WNQK
Mission 3	DNQ2
Mission 4	ZNQM
Mission 5	?MQM
Mission 6	!LQM
Mission 7	0LQN
Mission 8	1LQP
Mission 9	2LQQ