Part 6

From the east side of the room, snake past six crates and four guards to exit BUILDING ONE using CARD 4.

Enter the DESERT, equip your MINE DETECTOR (F3) to see MINES.

Enter the truck on the left to obtain PLASTIC EXPLOSIVES.

Exit the truck and head north through areas with MINES.

On the next screen, avoid bombs and enter the truck to find a RATION. Stock up and exit.

Continue north, dodging bombs on the next two screens. Use a RATION (F3) if needed.

Prepare to face the Tank boss.

Hide behind walls to avoid machine gun fire.

When the tank backs up, place a MINE in its path. Watch out for missiles.

To avoid missiles, place MINES to the side of the missile cannon.

Place two or three MINES at a time for a quicker battle. Use a RATION or two if hit by machine gun fire.

After destroying the Tank, proceed north to an empty screen, then to a screen with three guards.

After a cutscene (a non-interactive cinematic the game plays automatically), Big Boss will call (F4) to inform you that you have reached a checkpoint (an auto-save point you restart from on death) and need an enemy uniform. His new frequency is 120.13.

Equip the UNIFORM (F3) and proceed forward. Guards will let you enter BUILDING TWO.

From the entrance of BUILDING TWO, head right. Take out the patrolling guard in the northwest corner.

Use CARD 4 to enter the room, grab MINES and AMMO, and exit.

Take out the guard across the drainage system.

Go down into the drainage system and head left. Use CARD 4 to enter the door.

Ignore guards if they see you and proceed into the room to face the Bulldozer boss.

Exit the room as the Bulldozer approaches.

Equip your GRENADE LAUNCHER (F2) and re-enter the room.

Fire grenades at the Bulldozer. It will explode after being hit by eight grenades.

Use CARD 4 to enter the next room with five laser walls.

Equip your INFRARED GOGGLES (F3) to see the lasers and navigate past them.

Enter the elevator and take it to the roof.

Upon entering the roof, you will be attacked by three guards. Use CARD 2 to enter the room on the left and find a POW who reveals Dr. Pettrovich is in the basement.

Exit the room and proceed east, sneaking past four attacking guards.

Head south, past three patrolling guards.

Use CARD 4 to enter the door in the center of the screen to find a rocket guard, AMMO, and CARD 5.

Exit the room, run past more rocket guards, and use CARD 5 to enter the next room.

Run past the rocket guard and use CARD 5 to enter the elevator. Take it to the first floor basement.

Exit the elevator and take out the two guard dogs.

Use CARD 5 to exit the room and find several doors.

Use CARD 5 to enter the door in the northwest corner and rescue a POW.

Use CARD 5 to open the door on the far west wall. Equip your GAS MASK (F3) before entering.

Head north to a dead end. Punch the north path wall to reveal a hidden path.

Use PLASTIC EXPLOSIVES (F2) to blow up the wall and proceed.

Follow the path to a door. Use CARD 1 to open it and rescue a POW. Re-equip your GAS MASK before exiting.

Head left and use CARD 5 to enter a room where you will find Dr. Pettrovich Madnar.