Blaster Master

"Jason had a pet frog named Fred. One day, Fred decided he had enough of 
being in a fish bowl and made a dash for the door. Once outside, Jason
was totally amazed to find Fred running toward a huge radioactive chest.
As soon as Fred touched it, he grew to an enormous size, and the radio-
active chest fell into the earth along with Fred. Jason tried to reach
for Fred but fell into the hole along with him." etc.

Q: How do I find the boss in area 8?
A: ... OK. Go left into the room with lots of little platforms and spikes.
Drop down and go through a door to the right. Run along the hallway until
you find a leftward door. Go through it and hover across the spikes. Go
down this hall until you come across a rightward door. Go across it; now
comes the most difficult part: Go straight (and not up), jump across all
the little spike pits, and shoot all of the little buggers in your way. 
Continue along that path and you'll eventually reach the door you need. You
know you're at the right place when you find yourself in a room completely
filled with shootable blocks.

Q: All right, so how do I kill the area 8 boss?
A: First off, start shooting the blocks in the main area until you come
across at least one flashing gun power-up. Then go through the door on the
top center of the room and you'll encounter the guy on the cartridge cover.
Just stay where you are and shoot up into the boss's head (he is impervious
to grendes). He'll eventually die and you'll be transported to another
boss. Stay on the bottom of the screen. When the boss stops to whip you,
move yourself so that you are directly in front of the boss; if you're
positioned correctly, the boss will whip straight ahead and miss you. 
Grenade until death occurs.

Easy Kill: To quickly and easily kill several of the bosses, toss a
grenade at them. When they begin flashing after being hit, pause the game. As
long as the game is paused, the boss suffers more and more damage as it
flashes! If you wait long enough, 1 grenade may completely kill a boss! This
works on bosses 2,4,6 and 7.