<s>
Hard	B-Application
Head	I-Application
(	O
stylized	O
as	O
HAP.D	O
HEAD	O
)	O
,	O
originally	O
known	O
in	O
Korea	O
as	O
Dr.	O
Bulgehead	O
(	O
hangul	B-Operating_System
=	O
짱구	O
박사|RR	O
=	O
Jjang-gu	O
Bagsa|MR	O
=	O
Jjang-gu	O
Baksa	O
)	O
,	O
in	O
which	O
both	O
the	O
original	O
title	O
and	O
characters	O
were	O
loosely	O
based	O
on	O
a	O
comic	O
book	O
series	O
of	O
the	O
same	O
name	O
,	O
created	O
by	O
painter	O
Woo-young	O
Koh	O
with	O
his	O
author	O
and	O
brother	O
Go	O
Woo-young	O
.	O
</s>
<s>
This	O
is	O
an	O
obscure	O
2D	O
side-scrolling	O
platform	O
game	O
that	O
was	O
developed	O
and	O
produced	O
by	O
SunA	O
Electronics	O
of	O
an	O
unknown	O
team	O
of	O
game	O
designers/programmers	O
,	O
and	O
internationally	O
released	O
only	O
for	O
the	O
arcades	O
from	O
South	O
Korea	O
to	O
arcades	O
worldwide	O
during	O
the	O
1988	B-Application
Summer	O
Olympics	O
.	O
</s>
<s>
The	O
gameplay	O
and	O
visuals	O
are	O
similar	O
to	O
Famicom	O
games	O
such	O
as	O
Super	B-Application
Mario	I-Application
Bros	I-Application
.	I-Application
(	O
1985	O
)	O
but	O
with	O
a	O
more	O
bizarre	O
and	O
offbeat	O
twist	O
,	O
as	O
well	O
as	O
an	O
unusual	O
storyline	O
.	O
</s>
<s>
Similar	O
to	O
Bubble	B-Application
Bobble	I-Application
(	O
1986	O
)	O
,	O
the	O
Head	O
Twins	O
are	O
able	O
to	O
use	O
bubble-guns	O
to	O
entrap	O
inexplicable	O
hazards	O
such	O
as	O
Indians	O
,	O
chicks	O
,	O
scissors	O
,	O
bandits	B-Application
,	O
toothbrush	O
,	O
insects	O
,	O
snails	B-Application
,	O
larva	O
,	O
cat	O
like	O
creatures	O
,	O
little	B-Application
purple	I-Application
skulls	I-Application
,	O
and	O
monsters	B-Application
so	O
they	O
can	O
jump	O
on	O
their	O
heads	O
to	O
knock	O
them	O
off	O
the	O
stage	O
,	O
they	O
can	O
also	O
find	O
bombs	O
and	O
steel	O
mallets	O
to	O
clobber	O
anything	O
in	O
their	O
paths	O
,	O
which	O
is	O
also	O
a	O
homage	O
to	O
the	O
game	O
Wrecking	B-Application
Crew	I-Application
(	O
1985	O
)	O
.	O
</s>
<s>
The	O
names	O
of	O
the	O
three-haired	O
heroic	O
duo	O
are	O
Hard	B-Application
Head	I-Application
( 하드	O
헤드	O
)	O
who	O
dons	O
red	O
overalls	O
,	O
alongside	O
his	O
twin	O
brother	O
Dr.	O
Bulgehead	O
( 짱구	O
박사	O
)	O
who	O
dons	O
cyan	O
overalls	O
.	O
</s>
<s>
Armed	O
with	O
bubble	O
guns	O
,	O
sledgehammers	O
,	O
bombs	O
,	O
and	O
super	O
strong	O
big-heads	O
;	O
the	O
duo	O
embarks	O
on	O
a	O
romantic	O
and	O
courageous	O
adventure	O
to	O
collect	O
goods	O
,	O
battle	O
creatures	O
and	O
monsters	B-Application
,	O
and	O
to	O
please	O
their	O
girlfriend	O
.	O
</s>
<s>
The	O
yellow-haired	O
lover	O
of	O
Hard	B-Application
Head	I-Application
(	O
and	O
apparently	O
Dr.	O
Bulgehead	O
)	O
,	O
she	O
is	O
a	O
female	O
hippie	O
who	O
appears	O
at	O
the	O
end	O
of	O
all	O
16	O
phases	O
,	O
followed	O
by	O
an	O
additional	O
big-headed	O
spawn	O
,	O
with	O
legs	O
,	O
and	O
bugged-out	O
glasses	O
for	O
each	O
phase	O
passed	O
,	O
until	O
she	O
has	O
all	O
16	O
.	O
</s>
<s>
Advanced	O
Computer	O
Entertainment	O
compared	O
the	O
game	O
to	O
Super	B-Application
Mario	I-Application
Bros	I-Application
.	I-Application
and	O
called	O
it	O
"	O
unoriginal	O
but	O
addicting	O
fun.	O
"	O
</s>
<s>
In	O
1991	O
,	O
a	O
second	O
installment	O
was	O
released	O
,	O
titled	O
Hard	B-Application
Head	I-Application
2	O
,	O
originally	O
titled	O
Dr.	O
Bulgehead	O
2	O
(	O
hangul	B-Operating_System
=	O
짱구	O
박사	O
2|RR	O
=	O
Jjang-gu	O
Bagsa	O
Du|MR	O
=	O
Jjang-gu	O
Baksa	O
Du	O
)	O
.	O
</s>
<s>
Unlike	O
the	O
original	O
game	O
,	O
Hard	B-Application
Head	I-Application
2	O
has	O
similar	O
gameplay	O
to	O
other	O
arcade	O
platform	O
games	O
such	O
as	O
Ghouls	B-Application
'	I-Application
n	I-Application
Ghosts	I-Application
(	O
1988	B-Application
)	O
and	O
Toki	B-Application
(	O
1989	O
)	O
.	O
</s>
<s>
In	O
the	O
game	O
's	O
story	O
,	O
Hard	B-Application
Head	I-Application
is	O
dancing	O
with	O
his	O
girlfriend	O
until	O
all	O
of	O
a	O
sudden	O
,	O
the	O
devil	O
of	O
hell	O
rises	O
and	O
holds	O
her	O
hostage	O
in	O
his	O
mouth	O
.	O
</s>
<s>
In	O
between	O
levels	O
,	O
the	O
devil	O
chews	O
on	O
Hard	B-Application
Head	I-Application
’s	O
girlfriend	O
,	O
then	O
he	O
heroically	O
says	O
"	O
I	O
am	O
going	O
to	O
rescue	O
you	O
,	O
may	O
you	O
being	O
safe	O
!...	O
"	O
.	O
</s>
<s>
Hard	B-Application
Head	I-Application
once	O
again	O
enlists	O
the	O
help	O
of	O
his	O
twin	O
brother	O
Dr.	O
Bulgehead	O
to	O
the	O
rescue	O
,	O
they	O
both	O
can	O
take	O
two	O
hits	O
from	O
any	O
foe	O
.	O
</s>
<s>
Here	O
are	O
the	O
other	O
arcade	O
machines	O
made	O
by	O
SunA	O
Electronics	O
before	O
and	O
after	O
the	O
time	O
period	O
that	O
Hard	B-Application
Head	I-Application
1	O
&	O
2	O
was	O
produced	O
:	O
</s>
