<s>
Each	O
Air	B-Application
Fortress	I-Application
has	O
two	O
levels	O
:	O
the	O
Air	O
Base	O
and	O
the	O
Fortress	O
itself	O
.	O
</s>
<s>
On	O
approach	O
to	O
the	O
Air	B-Application
Fortress	I-Application
,	O
Hal	O
Bailman	O
battles	O
the	O
enemy	O
from	O
his	O
lightship	O
.	O
</s>
<s>
During	O
this	O
phase	O
,	O
the	O
player	O
has	O
three	O
attempts	O
to	O
successfully	O
reach	O
the	O
Air	O
Lock	O
that	O
grants	O
access	O
to	O
the	O
Air	B-Application
Fortress	I-Application
.	O
</s>
<s>
Air	B-Application
Fortress	I-Application
was	O
developed	O
by	O
Japanese	O
video	O
game	O
maker	O
HAL	O
Laboratory	O
.	O
</s>
<s>
"	O
SUGA	O
,	O
"	O
the	O
password	O
for	O
the	O
final	O
air	B-Application
fortress	I-Application
,	O
is	O
a	O
reference	O
to	O
Air	B-Application
Fortress	I-Application
director	O
,	O
game	O
designer	O
,	O
and	O
programmer	O
Hiroaki	O
Suga	O
.	O
</s>
<s>
HAL	O
America	O
offered	O
Air	B-Application
Fortress	I-Application
by	O
mail	O
order	O
through	O
a	O
national	O
advertising	O
campaign	O
.	O
</s>
<s>
Players	O
who	O
purchased	O
the	O
game	O
through	O
HAL	O
received	O
a	O
free	O
Air	B-Application
Fortress	I-Application
T-shirt	O
.	O
</s>
<s>
Air	B-Application
Fortress	I-Application
garnered	O
average	O
reviews	O
from	O
critics	O
.	O
</s>
<s>
Nintendo	B-Application
Power	I-Application
gave	O
the	O
game	O
positive	O
ratings	O
to	O
its	O
audiovisual	O
presentation	O
,	O
control	O
,	O
challenge	O
and	O
fun	O
factor	O
.	O
</s>
