Use these passwords to unlock the corresponding level:
1: Mortar, Tank, Mortar, Jeep
2: Jeep, Jeep, Mortar, Plane
3: Tank, Grenade, Tank, Mortar
4: Rifle, Mortar, Jeep, Plane
5: Mortar, Rifle, Plane, Jeep
6: Mortar, Grenade, Rifle, Chopper
7: Plane, Grenade, Rifle, Tank
8: Grenade, Mortar, Chopper, Mortar
9: Tank, Mortar, Rifle, Tank
10: Jeep, Chopper, Tank, Mortar
11: Rifle, Mortar, Grenade, Mortar
12: Jeep, Chopper, Grenade, Chopper
13: Plane, Plane, Grenade, Mortar
14: Plane, Rifle, Plane, Chopper
15: Rifle, Chopper, Chopper, Tank
16: Chopper, Chopper, Rifle, Grenade
17: Rifle, Tank, Plane, Mortar
18: Rifle, Rifle, Grenade, Jeep
19: Rifle, Jeep, Chopper, Grenade
20: Chopper, Grenade, Rifle, Jeep
21: Mortar, Grenade, Chopper, Jeep
22: Rifle, Tank, Chopper, Rifle
23: Plane, Jeep, Tank, Mortar
24: Chopper, Rifle, Jeep, Mortar
25: Tank, Grenade, Plane, Grenade
26: Plane, Tank, Rifle, Mortar
27: Tank, Tank, Jeep, Tank
28: Jeep, Tank, Jeep, Mortar