<s>
is	O
a	O
third-person	O
shooter	O
video	O
game	O
developed	O
by	O
Smilebit	O
and	O
published	O
by	O
Sega	O
for	O
the	O
Microsoft	O
Xbox	B-Application
.	O
</s>
<s>
It	O
was	O
released	O
on	O
March	O
18	O
,	O
2002	O
in	O
North	O
America	O
;	O
March	O
21	O
,	O
2002	O
in	O
Japan	O
;	O
and	O
May	O
17	O
,	O
2002	O
in	O
PAL	B-Language
regions	O
.	O
</s>
<s>
Set	O
in	O
an	O
alternate	O
history	O
science	O
fiction	O
world	O
where	O
the	O
British	O
Empire	O
rules	O
Earth	O
and	O
various	O
extrasolar	O
planets	O
,	O
the	O
game	O
tasks	O
the	O
player	O
with	O
exterminating	O
the	O
giant	O
insects	O
that	O
infest	O
the	O
colonies	O
of	O
the	O
planet	O
Tir	B-Application
na	I-Application
Nog	I-Application
.	O
</s>
<s>
Originally	O
in	O
development	O
for	O
the	O
Sega	B-Operating_System
Dreamcast	I-Operating_System
,	O
the	O
game	O
was	O
moved	O
to	O
the	O
Xbox	B-Application
to	O
take	O
advantage	O
of	O
its	O
improved	O
hardware	O
and	O
controls	O
.	O
</s>
<s>
Gunvalkyrie	B-Application
received	O
mixed	O
reviews	O
from	O
critics	O
,	O
who	O
praised	O
its	O
graphics	O
and	O
innovation	O
,	O
but	O
criticized	O
its	O
steep	O
learning	O
curve	O
stemming	O
from	O
its	O
complex	O
controls	O
.	O
</s>
<s>
The	O
game	O
takes	O
place	O
in	O
an	O
alternate	O
history	O
in	O
1906	O
where	O
the	O
British	O
Empire	O
rules	O
all	O
of	O
Earth	O
and	O
several	O
extrasolar	O
colony	O
worlds	O
,	O
powered	O
by	O
technology	O
brought	O
to	O
the	O
planet	O
by	O
Halley	B-Application
's	I-Application
Comet	I-Application
in	O
1835	O
.	O
</s>
<s>
A	O
complete	O
mystery	O
to	O
all	O
,	O
Gate	O
also	O
holds	O
great	O
power	O
over	O
economic	O
,	O
political	O
and	O
military	O
affairs	O
,	O
and	O
is	O
the	O
founder	O
of	O
the	O
Hebble	O
Foundation	O
and	O
the	O
GunValkyrie	B-Application
(	O
GV	O
)	O
Organization	O
,	O
composed	O
of	O
Halley	O
's	O
Chosen	O
throughout	O
the	O
world	O
to	O
prevent	O
the	O
misuse	O
of	O
technology	O
.	O
</s>
<s>
In	O
addition	O
to	O
his	O
disappearance	O
,	O
the	O
residents	O
of	O
the	O
colonized	O
planet	O
of	O
Tir	B-Application
na	I-Application
Nog	I-Application
have	O
also	O
disappeared	O
,	O
with	O
an	O
outbreak	O
of	O
large	O
alien	O
creatures	O
that	O
resemble	O
giant	O
insects	O
in	O
their	O
place	O
.	O
</s>
<s>
In	O
response	O
,	O
members	O
of	O
an	O
elite	O
military	O
force	O
within	O
the	O
GV	O
organization	O
,	O
known	O
as	O
"	O
Team	O
Dolphin	O
"	O
(	O
established	O
1887	O
)	O
is	O
sent	O
to	O
investigate	O
Gate	O
's	O
disappearance	O
as	O
well	O
as	O
the	O
situation	O
on	O
Tir	B-Application
na	I-Application
Nog	I-Application
.	O
</s>
<s>
The	O
two	O
playable	O
characters	O
are	O
Kelly	O
O'Lenmey	O
,	O
born	O
in	O
Ballymun	O
,	O
Ireland	O
,	O
a	O
collected	O
idealist	O
who	O
once	O
aided	O
the	O
Irish	O
Republic	O
in	O
their	O
fight	O
for	O
independence	O
until	O
their	O
methods	O
caused	O
her	O
to	O
leave	O
and	O
join	O
the	O
GV	O
,	O
and	O
Saburouta	O
Mishima	O
,	O
born	O
in	O
Kyushu	O
,	O
Japan	O
,	O
an	O
exiled	O
Samurai	B-Application
of	O
the	O
Meiji	O
Restoration	O
who	O
was	O
saved	O
by	O
the	O
GV	O
after	O
he	O
was	O
unjustly	O
sentenced	O
to	O
capital	O
punishment	O
.	O
</s>
<s>
GunValkyrie	B-Application
was	O
originally	O
developed	O
for	O
the	O
Sega	B-Operating_System
Dreamcast	I-Operating_System
.	O
</s>
<s>
Its	O
visual	O
style	O
was	O
very	O
similar	O
to	O
the	O
final	O
Xbox	B-Application
version	O
.	O
</s>
<s>
The	B-Operating_System
Dreamcast	I-Operating_System
version	O
's	O
distinguishing	O
feature	O
was	O
that	O
during	O
the	O
game	O
's	O
development	O
,	O
GunValkyrie	B-Application
utilized	O
a	O
unique	O
control	O
scheme	O
using	O
both	O
a	O
light	O
gun	O
and	O
a	O
controller	O
.	O
</s>
<s>
This	O
control	O
scheme	O
was	O
dropped	O
when	O
development	O
shifted	O
to	O
the	O
Xbox	B-Application
version	O
.	O
</s>
<s>
It	O
was	O
during	O
this	O
time	O
period	O
that	O
TokyoPop	O
was	O
publishing	O
Sega	O
soundtrack	O
releases	O
in	O
the	O
United	O
States	O
,	O
including	O
GunValkyrie	B-Application
,	O
Virtua	B-Application
Fighter	I-Application
4	I-Application
,	O
Panzer	B-Application
Dragoon	I-Application
Orta	I-Application
and	O
the	O
Sonic	B-Application
Adventure	I-Application
2	I-Application
Official	O
Soundtrack	O
.	O
</s>
<s>
GunValkyrie	B-Application
Official	O
Soundtrack	O
was	O
released	O
on	O
April	O
2	O
,	O
2002	O
.	O
</s>
<s>
In	O
Japan	O
,	O
during	O
the	O
week	O
of	O
the	O
release	O
,	O
the	O
game	O
sold	O
6000	O
units	O
becoming	O
the	O
only	O
Xbox	B-Application
game	O
to	O
make	O
it	O
to	O
the	O
top	O
30	O
best-selling	O
video	O
games	O
.	O
</s>
<s>
It	O
was	O
a	O
runner-up	O
for	O
GameSpots	O
annual	O
"	O
Most	O
Disappointing	O
Game	O
on	O
Xbox	B-Application
"	O
award	O
,	O
which	O
went	O
to	O
ToeJam	B-Application
&	I-Application
Earl	I-Application
III	I-Application
.	O
</s>
<s>
In	O
2009	O
,	O
GamesRadar	O
included	O
it	O
among	O
the	O
games	O
"	O
with	O
untapped	O
franchise	O
potential	O
"	O
,	O
and	O
commenting	O
on	O
the	O
game	O
's	O
difficulty	O
:	O
"	O
a	O
true	O
gaming	O
workout	O
,	O
but	O
few	O
games	O
in	O
the	O
Xbox	B-Application
library	O
were	O
as	O
beautiful	O
to	O
look	O
at	O
or	O
more	O
rewarding	O
to	O
play.	O
"	O
</s>
