<s>
It	O
is	O
the	O
sequel	O
to	O
Xevious	B-Application
,	O
a	O
popular	O
arcade	O
game	O
released	O
in	O
late	O
1982	O
,	O
and	O
the	O
fourth	O
installment	O
in	O
the	O
Xevious	B-Application
franchise	O
overall	O
.	O
</s>
<s>
The	O
player	O
controls	O
a	O
spaceship	O
named	O
the	O
Solvalou	O
in	O
its	O
mission	O
to	O
destroy	O
a	O
powerful	O
supercomputer	B-Architecture
named	O
GAMP	O
,	O
which	O
took	O
over	O
Earth	O
during	O
an	O
ice	B-Device
age	I-Device
.	O
</s>
<s>
Created	O
in	O
response	O
to	O
the	O
overwhelming	O
success	O
of	O
the	O
Family	O
Computer	O
port	O
of	O
Xevious	B-Application
,	O
GAMP	O
no	O
Nazo	O
was	O
not	O
designed	O
by	O
Masanobu	O
Endo	O
,	O
the	O
creator	O
of	O
the	O
original	O
game	O
.	O
</s>
<s>
Though	O
they	O
share	O
a	O
similar	O
title	O
and	O
gameplay	O
,	O
GAMP	O
no	O
Nazo	O
is	O
not	O
the	O
same	O
as	O
the	O
arcade	O
game	O
Super	B-Application
Xevious	I-Application
.	O
</s>
<s>
This	O
led	O
to	O
a	O
rethinking	O
of	O
the	O
series	O
 '	O
direction	O
,	O
with	O
future	O
Xevious	B-Application
sequels	O
omitting	O
many	O
of	O
GAMP	O
no	O
Nazos	O
design	O
choices	O
.	O
</s>
<s>
The	O
game	O
was	O
re-released	O
for	O
the	O
Nintendo	B-Application
Vs.	I-Application
System	I-Application
arcade	O
game	O
hardware	O
in	O
1987	O
,	O
and	O
through	O
the	O
Namco	O
Museum	O
Archives	O
Vol	O
.	O
</s>
<s>
Super	B-Application
Xevious	I-Application
:	I-Application
GAMP	I-Application
no	I-Application
Nazo	I-Application
is	O
a	O
vertical-scrolling	O
shooter	O
video	O
game	O
,	O
and	O
the	O
sequel	O
to	O
Xevious	B-Application
.	O
</s>
<s>
The	O
plot	O
involves	O
a	O
supercomputer	B-Architecture
,	O
General	O
Artificial	O
Matrix	O
Producer	O
(	O
GAMP	O
)	O
,	O
taking	O
control	O
of	O
Earth	O
after	O
an	O
ice	B-Device
age	I-Device
freezes	O
the	O
planet	O
and	O
its	O
population	O
.	O
</s>
<s>
The	O
player	O
's	O
ship	O
,	O
the	O
Solvalou	O
,	O
is	O
deployed	O
to	O
destroy	O
GAMP	O
and	O
the	O
Xevious	B-Application
forces	O
.	O
</s>
<s>
Super	B-Application
Xevious	I-Application
:	I-Application
GAMP	I-Application
no	I-Application
Nazo	I-Application
was	O
designed	O
by	O
Namco	O
as	O
a	O
sequel	O
to	O
the	O
original	O
Xevious	B-Application
.	O
</s>
<s>
Endo	O
was	O
against	O
the	O
idea	O
of	O
a	O
sequel	O
to	O
Xevious	B-Application
as	O
he	O
felt	O
it	O
was	O
unnecessary	O
.	O
</s>
<s>
The	O
overwhelming	O
success	O
of	O
the	O
Family	O
Computer	O
home	O
version	O
of	O
Xevious	B-Application
prompted	O
Namco	O
to	O
disregard	O
Endo	O
's	O
wishes	O
,	O
and	O
create	O
a	O
sequel	O
to	O
cash	O
in	O
on	O
the	O
game	O
's	O
popularity	O
.	O
</s>
<s>
Despite	O
its	O
similar	O
title	O
and	O
gameplay	O
,	O
GAMP	O
no	O
Nazo	O
and	O
the	O
arcade	O
game	O
Super	B-Application
Xevious	I-Application
have	O
little	O
in	O
common	O
.	O
</s>
<s>
The	O
game	O
was	O
packaged	O
in	O
a	O
long	O
plastic	O
box	O
with	O
a	O
reflective	O
gold	O
cartridge	O
shell	O
,	O
similar	O
to	O
Nintendo	O
's	O
The	B-Application
Legend	I-Application
of	I-Application
Zelda	I-Application
.	O
</s>
<s>
In	O
1987	O
,	O
GAMP	O
no	O
Nazo	O
was	O
released	O
in	O
arcades	O
for	O
the	O
Nintendo	B-Application
Vs.	I-Application
System	I-Application
,	O
where	O
it	O
was	O
renamed	O
Vs.	O
Super	B-Application
Xevious	I-Application
.	O
</s>
<s>
Super	B-Application
Xevious	I-Application
:	I-Application
GAMP	I-Application
no	I-Application
Nazo	I-Application
was	O
a	O
commercial	O
failure	O
,	O
and	O
struggled	O
to	O
gain	O
sales	O
.	O
</s>
<s>
Because	O
of	O
its	O
changes	O
to	O
the	O
gameplay	O
of	O
its	O
predecessor	O
,	O
it	O
has	O
since	O
gained	O
a	O
negative	O
reputation	O
from	O
fans	O
,	O
who	O
believe	O
it	O
discards	O
what	O
they	O
felt	O
made	O
the	O
original	O
Xevious	B-Application
so	O
great	O
.	O
</s>
<s>
Its	O
failure	O
has	O
been	O
attributed	O
to	O
the	O
release	O
of	O
games	O
such	O
as	O
Gradius	B-Application
,	O
which	O
raised	O
the	O
bar	O
for	O
what	O
the	O
genre	O
should	O
be	O
like	O
.	O
</s>
<s>
The	O
staff	O
at	O
Family	O
Computer	O
Magazine	O
felt	O
indifferent	O
towards	O
the	O
game	O
's	O
usage	O
of	O
puzzle-solving	O
,	O
believing	O
it	O
would	O
surely	O
be	O
a	O
"	O
controversial	O
"	O
change	O
with	O
Xevious	B-Application
fans	O
.	O
</s>
<s>
Retro	O
Gamers	O
Stuart	O
Campbell	O
,	O
who	O
covered	O
it	O
in	O
a	O
2007	O
retrospective	O
on	O
the	O
Xevious	B-Application
franchise	O
,	O
noted	O
of	O
the	O
game	O
's	O
drastic	O
changes	O
in	O
pace	O
from	O
its	O
predecessor	O
.	O
</s>
<s>
The	O
commercial	O
and	O
critical	O
failure	O
of	O
Super	B-Application
Xevious	I-Application
:	I-Application
GAMP	I-Application
no	I-Application
Nazo	I-Application
prompted	O
Namco	O
to	O
rethink	O
the	O
direction	O
that	O
the	O
Xevious	B-Application
series	O
was	O
taking	O
.	O
</s>
<s>
Future	O
sequels	O
to	O
the	O
original	O
,	O
such	O
as	O
Xevious	B-Application
:	I-Application
Fardraut	I-Application
Saga	I-Application
(	O
1988	O
)	O
and	O
Xevious	B-Application
3D/G	I-Application
(	O
1996	O
)	O
,	O
ignored	O
many	O
concepts	O
established	O
in	O
GAMP	O
no	O
Nazo	O
and	O
chose	O
to	O
stick	O
to	O
the	O
formula	O
established	O
in	O
the	O
first	O
game	O
.	O
</s>
<s>
GAMP	O
no	O
Nazo	O
was	O
the	O
first	O
Xevious	B-Application
title	O
to	O
have	O
GAMP	O
as	O
a	O
character	O
in-game	O
,	O
as	O
previously	O
he	O
had	O
only	O
appeared	O
by	O
name	O
in	O
promotional	O
material	O
;	O
GAMP	O
has	O
appeared	O
in	O
most	O
Xevious	B-Application
sequels	O
since	O
.	O
</s>
<s>
The	O
game	O
appears	O
as	O
the	O
name	O
of	O
a	O
fictional	O
sponsor	O
in	O
the	O
2004	O
PlayStation	B-Operating_System
Portable	I-Operating_System
game	O
Ridge	B-Application
Racers	I-Application
.	O
</s>
<s>
In	O
2016	O
,	O
Japanese	O
company	O
Dream	O
Factory	O
published	O
Xevious	B-Application
:	O
GAMP	O
no	O
Nazo	O
wa	O
Subete	O
Hodoketa	O
!	O
?	O
</s>
<s>
for	O
iOS	B-Application
devices	O
.	O
</s>
<s>
It	O
is	O
a	O
Xevious	B-Application
game	O
created	O
for	O
Bandai	O
Namco	O
Entertainment	O
's	O
"	O
Catalog	O
IP	O
Project	O
"	O
program	O
,	O
which	O
allowed	O
developers	O
to	O
use	O
Namco	O
video	O
games	O
for	O
their	O
own	O
projects	O
.	O
</s>
