The Master Builder, level 4

START POSITION – Knife down the brown cloak. Open the secret door behind you and get a reveolver.

Make it here and battle the armour for an axe.

Then make it here. Kill the pirate by blowing up the barrels, or have him blow himself up. Take his missile launcher.

Continue east and south. Save your missiles for the black cloak and acquire his plasma cannon.

Locate this secret door. Defeat the armour and get the cross within.

You may now explore the central rooms you have access to so far, or continue directly to...

...this room and engage in a heavy battle to conquer a gatling gun.

Engage in more heavy battles on your way to this room. Break the mirror to open a new path.

Kill most of the guards in this room by blowing up the barrel. Finish with the rest. Get the brass key.

Find a 1-up behind this secret door.

At this point whichever door you open both ghosts will come at you at once.

Make your way back and fight the enemies in this room for the silver key, and a 1-up (if you have not already done so).

Stop by this room and clean it out a 1-up.

Beware the armour by the door to this room. Clean out the room (if you have not already done so). Break the mirror to open a new path.

Open this door and have the ghosts come at you. Be very much aware the bombs in the passage! This part is hard. Get the gold key and a 1-up.

Now head for the center of the floor. Battle the armours in the big room and get the bronze key.

Find the iron key here.

Open this secret door.

Defeat the enemies in this room. Save the girl.

Exit at this point.