Now, the view will switch to another map where you can see Robotnik's
large factory. Apparently, Sonic is trying to sneak in through the
underground sewers for you visit this underwater stage similar to the
Genesis' version. Like the Genesis Sonic 1, you must keep getting air
bubbles to stay alive underwater or else you'll drown. You can also
jump out of the water to relieve the drown countdown. Enemies to look
out for here are Grounders, Orbinauts, and Jaws. There are many spikes
too, multiple ones lining the floor or the ceiling, and lone ones that
pop out of the ground. Also, certain light colored platforms you step
on send you floating upwards. Most send you into spikes if you don't
get off them at the crucial point. Act 3 isn't really tough, but it is
kind of hard. The room will have two holes in the left and right of
the ceiling and one hole in the middle of the floor. Robotnik will
come up from the bottom hole first. Jump on him and lean to the left
after he fires his two energy balls. If you leaned far enough, you'll
land on the left platform. He'll come down from the left side hole
next. Hit him three times then move all the way to the left. He'll
shoot a missle. Once it gets in front of you, it will fly straight
forward. Wait for it to reach your level, then jump. Then, jump to the
right platform so you'll be ready when Robotnik comes in from the hole
on the right side. Hit his ship four times now and you should defeat
him before he shoots the missle. Now, go free those animals from their
prison! This time, it will be seals and penguins that will be freed.
Labyrinth Zone