<s>
Border	B-Application
Down	I-Application
is	O
a	O
horizontally	O
scrolling	O
shooter	O
video	O
game	O
developed	O
and	O
published	O
by	O
G.rev	O
.	O
</s>
<s>
It	O
was	O
released	O
in	O
Japanese	O
arcades	O
in	O
April	O
2003	O
on	O
Sega	O
NAOMI	O
hardware	O
,	O
and	O
was	O
ported	O
to	O
the	B-Operating_System
Dreamcast	I-Operating_System
later	O
that	O
year	O
.	O
</s>
<s>
The	O
story	O
takes	O
place	O
in	O
the	O
future	O
where	O
humans	O
are	O
defending	O
their	O
Mars	B-Application
colony	O
from	O
an	O
invading	O
alien	O
attack	O
.	O
</s>
<s>
Producer	O
Hiroyuki	O
Maruyama	O
was	O
heavily	O
inspired	O
by	O
Taito	O
's	O
shooter	O
Metal	B-Application
Black	I-Application
(	O
1991	O
)	O
and	O
founded	O
G.rev	O
with	O
ex-Taito	O
employees	O
specifically	O
to	O
develop	O
a	O
shooter	O
of	O
his	O
own	O
.	O
</s>
<s>
Among	O
the	O
projects	O
they	O
worked	O
on	O
were	O
Treasure	O
's	O
Ikaruga	B-Application
(	O
2001	O
)	O
and	O
Gradius	B-Application
V	I-Application
(	O
2004	O
)	O
.	O
</s>
<s>
Border	B-Application
Down	I-Application
was	O
released	O
to	O
mixed	O
reception	O
,	O
but	O
was	O
commercially	O
successful	O
and	O
continues	O
to	O
maintain	O
a	O
steady	O
interest	O
from	O
shooter	O
fans	O
.	O
</s>
<s>
G.rev	O
went	O
on	O
to	O
make	O
other	O
shoot	O
'	O
em	O
ups	O
including	O
Senko	B-Application
no	I-Application
Ronde	I-Application
and	O
Under	B-Application
Defeat	I-Application
.	O
</s>
<s>
Border	B-Application
Down	I-Application
is	O
a	O
side-scrolling	O
shoot	O
'	O
em	O
up	O
set	O
in	O
a	O
futuristic	O
setting	O
.	O
</s>
<s>
Centuries	O
after	O
humans	O
have	O
colonized	O
Mars	B-Application
,	O
hostile	O
aliens	O
begin	O
attacking	O
the	O
planet	O
.	O
</s>
<s>
The	O
Mars	B-Application
defense	O
force	O
mobilizes	O
and	O
launch	O
a	O
new	O
type	O
of	O
unmanned	O
aircraft	O
.	O
</s>
<s>
If	O
the	O
player	O
loses	O
a	O
life	O
in	O
the	O
red	O
border	O
,	O
it	O
is	O
game	B-Application
over	I-Application
,	O
though	O
a	O
continue	O
option	O
can	O
be	O
unlocked	O
through	O
repeated	O
play	O
.	O
</s>
<s>
The	B-Operating_System
Dreamcast	I-Operating_System
version	O
also	O
features	O
a	O
"	O
Remix	O
mode	O
"	O
with	O
new	O
enemy	O
attack	O
patterns	O
.	O
</s>
<s>
Border	B-Application
Down	I-Application
was	O
developed	O
and	O
published	O
by	O
G.rev	O
,	O
a	O
team	O
founded	O
by	O
producer	O
Hiroyuki	O
Maruyama	O
with	O
the	O
explicit	O
purpose	O
to	O
develop	O
a	O
shoot	O
'	O
em	O
up	O
.	O
</s>
<s>
The	O
remaining	O
amount	O
was	O
accumulated	O
through	O
freelance	O
work	O
,	O
including	O
subcontract	O
work	O
with	O
Treasure	O
on	O
two	O
shooters	O
,	O
Ikaruga	B-Application
(	O
2001	O
)	O
and	O
Gradius	B-Application
V	I-Application
(	O
2004	O
)	O
.	O
</s>
<s>
Ikaruga	B-Application
gave	O
G.rev	O
the	O
key	O
experience	O
of	O
programming	O
for	O
NAOMI	O
hardware	O
.	O
</s>
<s>
The	O
initial	O
concept	O
for	O
Border	B-Application
Down	I-Application
took	O
root	O
with	O
Maruyama	O
before	O
he	O
founded	O
G.rev	O
.	O
</s>
<s>
He	O
was	O
heavily	O
inspired	O
by	O
Taito	O
's	O
shooter	O
Metal	B-Application
Black	I-Application
(	O
1991	O
)	O
,	O
specifically	O
the	O
game	O
's	O
"	O
Beam	O
Level	O
"	O
system	O
.	O
</s>
<s>
He	O
also	O
borrowed	O
ideas	O
from	O
his	O
experiences	O
with	O
producing	O
G-Darius	B-Application
(	O
1997	O
)	O
with	O
Taito	O
,	O
particularly	O
the	O
game	O
's	O
branching	O
level	O
system	O
which	O
inspired	O
the	O
border	O
system	O
in	O
Border	B-Application
Down	I-Application
.	O
</s>
<s>
For	O
visual	O
inspiration	O
,	O
Maruyama	O
pulled	O
from	O
Kim	O
Stanley	O
Robinson	O
's	O
science	O
fiction	O
novel	O
Red	O
Mars	B-Application
.	O
</s>
<s>
The	O
music	O
was	O
composed	O
by	O
Yasuhisa	O
Watanabe	O
,	O
who	O
also	O
composed	O
the	O
music	O
to	O
Metal	B-Application
Black	I-Application
and	O
was	O
the	O
only	O
member	O
of	O
the	O
staff	O
who	O
had	O
worked	O
on	O
the	O
1991	O
shooter	O
.	O
</s>
<s>
In	O
Game	O
Ones	O
2006	O
French	O
TV	O
documentary	O
Japon	O
:	O
Histoire	O
du	O
Shooting	O
Game	O
,	O
Maruyama	O
said	O
that	O
all	O
he	O
wanted	O
was	O
to	O
make	O
Border	B-Application
Down	I-Application
and	O
if	O
G.rev	O
collapsed	O
afterwards	O
,	O
he	O
would	O
have	O
been	O
content	O
.	O
</s>
<s>
Border	B-Application
Down	I-Application
was	O
released	O
in	O
Japanese	O
arcades	O
on	O
25	O
April	O
2003	O
.	O
</s>
<s>
It	O
was	O
common	O
for	O
NAOMI	O
shooters	O
to	O
be	O
ported	O
to	O
Sega	O
's	O
home	O
console	O
,	O
the	B-Operating_System
Dreamcast	I-Operating_System
,	O
making	O
a	O
significant	O
portion	O
of	O
the	O
aging	O
console	O
's	O
extended	O
output	O
.	O
</s>
<s>
Although	O
a	O
Dreamcast	B-Operating_System
conversion	O
would	O
seem	O
like	O
an	O
obvious	O
choice	O
with	O
it	O
being	O
a	O
NAOMI	O
game	O
,	O
G.rev	O
spent	O
time	O
considering	O
which	O
console	O
was	O
most	O
suitable	O
for	O
a	O
home	O
port	O
.	O
</s>
<s>
They	O
decided	O
against	O
the	O
PlayStation	B-Device
2	I-Device
because	O
the	O
game	O
would	O
have	O
needed	O
a	O
complete	O
rebuild	O
from	O
the	O
ground	O
up	O
.	O
</s>
<s>
As	O
for	O
the	O
GameCube	B-Application
,	O
they	O
believed	O
Border	B-Application
Down	I-Application
was	O
not	O
suited	O
for	O
the	O
system	O
's	O
audience	O
.	O
</s>
<s>
With	O
these	O
factors	O
,	O
along	O
with	O
the	O
ease	O
of	O
porting	O
NAOMI	O
games	O
to	O
the	B-Operating_System
Dreamcast	I-Operating_System
,	O
they	O
chose	O
Sega	O
's	O
home	O
console	O
.	O
</s>
<s>
According	O
to	O
Edge	O
and	O
Jeuxvideo.com,	O
a	O
fan	O
petition	O
for	O
a	O
Dreamcast	B-Operating_System
port	O
was	O
another	O
factor	O
.	O
</s>
<s>
The	B-Operating_System
Dreamcast	I-Operating_System
port	O
was	O
released	O
a	O
few	O
months	O
after	O
the	O
arcade	O
version	O
,	O
on	O
25	O
September	O
2003	O
.	O
</s>
<s>
If	O
bought	O
through	O
Sega	O
Direct	O
,	O
the	O
game	O
came	O
with	O
a	O
Border	B-Application
Down	I-Application
branded	O
mouse	O
pad	O
.	O
</s>
<s>
Maruyama	O
was	O
prepared	O
to	O
fold	O
G.rev	O
if	O
Border	B-Application
Down	I-Application
was	O
not	O
successful	O
,	O
but	O
the	O
number	O
of	O
customer	O
orders	O
at	O
launch	O
exceeded	O
G.rev	O
and	O
Sega	O
's	O
expectations	O
,	O
so	O
they	O
continued	O
producing	O
new	O
copies	O
until	O
they	O
felt	O
demand	O
was	O
met	O
.	O
</s>
<s>
Border	B-Application
Down	I-Application
has	O
seen	O
continued	O
interest	O
post-release	O
.	O
</s>
<s>
It	O
has	O
since	O
become	O
one	O
of	O
the	O
most	O
coveted	O
Japanese	O
exclusives	O
for	O
Dreamcast	B-Operating_System
collectors	O
.	O
</s>
<s>
In	O
2011	O
,	O
Maruyama	O
stated	O
he	O
would	O
consider	O
rereleasing	O
Border	B-Application
Down	I-Application
or	O
his	O
2005	O
game	O
Under	B-Application
Defeat	I-Application
on	O
modern	O
platforms	O
.	O
</s>
<s>
Under	B-Application
Defeat	I-Application
was	O
rereleased	O
in	O
2012	O
for	O
the	O
PlayStation	B-Operating_System
3	I-Operating_System
and	O
Xbox	B-Operating_System
360	I-Operating_System
.	O
</s>
<s>
A	O
resin	O
kit	O
for	O
the	O
player	O
ship	O
from	O
Border	B-Application
Down	I-Application
was	O
released	O
in	O
February	O
2013	O
.	O
</s>
<s>
Edge	O
gave	O
the	B-Operating_System
Dreamcast	I-Operating_System
version	O
a	O
6	O
out	O
of	O
10	O
,	O
feeling	O
that	O
the	O
game	O
had	O
all	O
the	O
ingredients	O
to	O
be	O
an	O
outstanding	O
shooter	O
,	O
but	O
lacked	O
the	O
energy	O
to	O
push	O
it	O
to	O
that	O
next	O
level	O
.	O
</s>
<s>
They	O
explained	O
that	O
Border	B-Application
Down	I-Application
lacked	O
the	O
intensity	O
to	O
frighten	O
players	O
,	O
and	O
felt	O
that	O
good	O
shooters	O
need	O
that	O
type	O
of	O
panic	O
inducing	O
gameplay	O
.	O
</s>
<s>
In	O
retrospect	O
,	O
Eurogamer	O
called	O
Border	B-Application
Down	I-Application
"	O
arguably	O
 [ G.rev's ] 	O
best	O
game	O
"	O
,	O
among	O
the	O
likes	O
of	O
Senko	B-Application
no	I-Application
Ronde	I-Application
and	O
Under	B-Application
Defeat	I-Application
.	O
</s>
<s>
Retro	O
Gamer	O
called	O
it	O
one	O
of	O
the	O
highest	O
regarded	O
late-era	O
releases	O
for	O
the	B-Operating_System
Dreamcast	I-Operating_System
.	O
</s>
<s>
Jeuxvideo.com	O
believed	O
it	O
to	O
be	O
the	O
best	O
horizontal	O
shooter	O
for	O
the	B-Operating_System
Dreamcast	I-Operating_System
.	O
</s>
<s>
Kalata	O
felt	O
gameplay	O
similarities	O
to	O
the	O
Darius	O
series	O
,	O
while	O
Jeuxvideo.com	O
called	O
it	O
a	O
great	O
mix	O
of	O
classic	O
style	O
shooters	O
like	O
R-Type	B-Application
and	O
more	O
modern	O
manic	O
shooters	O
.	O
</s>
