Fight the super guards in these two bedrooms and collect more health chalices. Beware the bomb by the door to the middle bedroom.

Bring down the armour in this room for a 1-up.

The basement section:

Enter here. Take the nearby death chalice. Use your plasma gun to hit the barrels and the Super Officers around the corner. More enemies will come out from the room ahead.

One Super Officer may run and hide in here. Deal with him and get the cross and the health.

Drop the sub mutants in the washing room and the secret area. Take the bullets. Beware the bomb on your way to the 1-up.

Kill the guard in the vine cellar and enter this room. Finish with the ghosts and the sub mutants. Get the iron key.

Continue.