<s>
is	O
an	O
action-adventure	O
game	O
developed	O
and	O
published	O
by	O
Nintendo	O
for	O
the	O
Game	B-Device
Boy	I-Device
.	O
</s>
<s>
The	O
first	O
Metroid	B-Device
game	O
for	O
a	O
handheld	B-Application
game	I-Application
console	I-Application
,	O
it	O
was	O
released	O
in	O
North	O
America	O
in	O
November	O
1991	O
and	O
in	O
Japan	O
and	O
Europe	O
in	O
1992	O
.	O
</s>
<s>
The	O
game	O
follows	O
bounty	O
hunter	O
Samus	O
Aran	O
on	O
her	O
mission	O
to	O
eradicate	O
the	O
Metroids	B-Device
from	O
their	O
home	O
planet	O
,	O
SR388	O
,	O
before	O
the	O
Space	O
Pirates	O
can	O
obtain	O
them	O
.	O
</s>
<s>
Players	O
must	O
find	O
and	O
exterminate	O
the	O
Metroids	B-Device
to	O
progress	O
.	O
</s>
<s>
Like	O
the	O
original	O
Metroid	B-Device
released	O
in	O
1986	O
for	O
the	O
Nintendo	O
Entertainment	O
System	O
,	O
Metroid	B-Application
II	I-Application
was	O
developed	O
by	O
Nintendo	O
Research	O
&	O
Development	O
1	O
and	O
produced	O
by	O
Gunpei	O
Yokoi	O
.	O
</s>
<s>
Metroid	B-Application
II	I-Application
received	O
positive	O
reviews	O
,	O
with	O
praise	O
for	O
its	O
story	O
,	O
setting	O
,	O
and	O
improved	O
gameplay	O
,	O
but	O
was	O
criticized	O
for	O
its	O
graphics	O
and	O
audio	O
.	O
</s>
<s>
It	O
was	O
rereleased	O
on	O
the	O
Nintendo	B-Operating_System
3DS	I-Operating_System
Virtual	B-Application
Console	I-Application
service	O
in	O
2011	O
and	O
on	O
the	O
Nintendo	B-Application
Switch	I-Application
Online	I-Application
service	O
in	O
February	O
2023	O
.	O
</s>
<s>
A	O
sequel	O
,	O
Super	B-Application
Metroid	I-Application
,	O
was	O
released	O
for	O
the	O
Super	B-Application
Nintendo	I-Application
Entertainment	I-Application
System	I-Application
in	O
1994	O
.	O
</s>
<s>
A	O
remake	O
of	O
Metroid	B-Application
II	I-Application
,	O
Metroid	B-Application
:	I-Application
Samus	I-Application
Returns	I-Application
,	O
was	O
released	O
for	O
the	O
Nintendo	B-Operating_System
3DS	I-Operating_System
in	O
2017	O
.	O
</s>
<s>
Metroid	B-Application
II	I-Application
is	O
an	O
action-adventure	O
side-scroller	O
game	O
in	O
which	O
the	O
player	O
controls	O
the	O
protagonist	O
Samus	O
Aran	O
on	O
the	O
fictional	O
planet	O
SR388	O
.	O
</s>
<s>
Players	O
advance	O
through	O
the	O
game	O
by	O
using	O
Samus	O
 '	O
weapons	O
to	O
kill	O
a	O
fixed	O
number	O
(	O
47	O
)	O
of	O
Metroid	B-Device
creatures	O
.	O
</s>
<s>
The	O
player	O
is	O
given	O
a	O
detector	O
that	O
displays	O
the	O
number	O
of	O
Metroids	B-Device
remaining	O
in	O
the	O
area	O
.	O
</s>
<s>
The	O
Metroid	B-Device
creatures	O
are	O
encountered	O
in	O
different	O
evolution	O
stages	O
of	O
their	O
development	O
cycle	O
:	O
original	O
,	O
Alpha	O
,	O
Gamma	O
,	O
Zeta	O
and	O
Omega	O
.	O
</s>
<s>
Metroid	B-Application
II	I-Application
features	O
save	O
modules	O
located	O
around	O
the	O
planet	O
,	O
which	O
allow	O
players	O
to	O
save	O
their	O
progress	O
and	O
continue	O
in	O
another	O
session	O
.	O
</s>
<s>
The	O
game	O
features	O
two	O
weapons	O
new	O
to	O
the	O
Metroid	B-Device
series	O
:	O
the	O
tri-splitting	O
Spazer	O
Laser	O
Beam	O
,	O
and	O
the	O
Plasma	O
Beam	O
,	O
which	O
passes	O
through	O
enemies	O
when	O
shot	O
.	O
</s>
<s>
Metroid	B-Application
II	I-Application
features	O
the	O
Space	O
Jump	O
,	O
a	O
new	O
suit	O
enhancement	O
that	O
allows	O
Samus	O
to	O
jump	O
infinitely	O
and	O
access	O
otherwise	O
unreachable	O
areas	O
.	O
</s>
<s>
The	O
game	O
also	O
sees	O
the	O
return	B-Application
of	I-Application
Samus	I-Application
 '	O
Morph	O
Ball	O
,	O
a	O
mode	O
in	O
which	O
she	O
curls	O
up	O
into	O
a	O
ball	O
to	O
travel	O
through	O
small	O
tunnels	O
.	O
</s>
<s>
In	O
the	O
events	O
of	O
the	O
first	O
Metroid	B-Device
,	O
bounty	O
hunter	O
Samus	O
Aran	O
foiled	O
the	O
Space	O
Pirates	O
 '	O
plans	O
to	O
use	O
the	O
newly	O
discovered	O
lifeform	O
known	O
as	O
Metroids	B-Device
.	O
</s>
<s>
Some	O
time	O
later	O
,	O
the	O
Galactic	O
Federation	O
,	O
concerned	O
by	O
the	O
events	O
that	O
transpired	O
,	O
resolved	O
to	O
ensure	O
that	O
the	O
Metroids	B-Device
 '	O
power	O
could	O
never	O
again	O
be	O
used	O
by	O
the	O
Pirates	O
,	O
and	O
sent	O
several	O
teams	O
to	O
the	O
Metroid	B-Device
's	O
home	O
planet	O
SR388	O
to	O
destroy	O
the	O
species	O
once	O
and	O
for	O
all	O
.	O
</s>
<s>
While	O
exploring	O
the	O
planet	O
,	O
Samus	O
encounters	O
Metroids	B-Device
and	O
destroys	O
them	O
,	O
slowly	O
decreasing	O
the	O
planet	O
's	O
Metroid	B-Device
population	O
.	O
</s>
<s>
During	O
her	O
mission	O
,	O
she	O
notices	O
the	O
mutations	O
that	O
each	O
creature	O
exhibits	O
:	O
the	O
Metroids	B-Device
grow	O
from	O
small	O
jellyfish-like	O
creatures	O
into	O
large	O
,	O
hovering	O
,	O
lizard-like	O
beasts	O
.	O
</s>
<s>
After	O
destroying	O
most	O
of	O
the	O
planet	O
's	O
Metroids	B-Device
,	O
Samus	O
kills	O
the	O
Queen	O
Metroid	B-Device
.	O
</s>
<s>
Along	O
the	O
way	O
,	O
she	O
finds	O
a	O
Metroid	B-Device
egg	O
.	O
</s>
<s>
A	O
Metroid	B-Device
hatchling	O
floats	O
out	O
of	O
the	O
broken	O
shell	O
and	O
imprints	O
onto	O
Samus	O
,	O
thinking	O
that	O
she	O
is	O
its	O
mother	O
.	O
</s>
<s>
She	O
exits	O
the	O
tunnels	O
while	O
the	O
Metroid	B-Device
helps	O
clear	O
the	O
way	O
.	O
</s>
<s>
Reaching	O
the	O
planet	O
's	O
surface	O
,	O
Samus	O
and	O
the	O
infant	O
Metroid	B-Device
board	O
the	O
gunship	O
together	O
.	O
</s>
<s>
Metroid	B-Application
II	I-Application
was	O
developed	O
by	O
Nintendo	O
Research	O
&	O
Development	O
1	O
(	O
Nintendo	O
R&D1	O
)	O
,	O
and	O
produced	O
by	O
Gunpei	O
Yokoi	O
;	O
they	O
both	O
also	O
worked	O
on	O
the	O
previous	O
Metroid	B-Device
game	O
for	O
the	O
Nintendo	O
Entertainment	O
System	O
.	O
</s>
<s>
Metroid	B-Application
II	I-Application
marked	O
a	O
"	O
new	O
high	O
point	O
"	O
for	O
handheld	B-Application
game	I-Application
consoles	I-Application
,	O
with	O
graphics	O
that	O
were	O
almost	O
as	O
good	O
as	O
the	O
8-bit	O
graphics	O
in	O
games	O
for	O
the	O
NES	O
.	O
</s>
<s>
The	O
game	O
utilizes	O
the	O
cartridge	B-Protocol
's	O
battery-backed	O
memory	O
for	O
saving	O
the	O
player	O
's	O
progress	O
.	O
</s>
<s>
The	O
Game	B-Device
Boy	I-Device
's	O
black-and-white	O
graphics	O
resulted	O
in	O
changes	O
to	O
Samus	O
's	O
gear	O
that	O
eventually	O
became	O
permanent	O
.	O
</s>
<s>
In	O
the	O
original	O
Metroid	B-Device
,	O
color	O
was	O
used	O
to	O
differentiate	O
between	O
Samus	O
's	O
Power	O
Suit	O
and	O
her	O
Varia	O
Suitan	O
upgraded	O
version	O
.	O
</s>
<s>
However	O
,	O
without	O
color	O
on	O
the	O
Game	B-Device
Boy	I-Device
,	O
the	O
two	O
suits	O
would	O
have	O
appeared	O
similar	O
,	O
requiring	O
the	O
developers	O
to	O
develop	O
a	O
visual	O
indicator	O
for	O
players	O
to	O
determine	O
which	O
suit	O
Samus	O
is	O
wearing	O
.	O
</s>
<s>
Nintendo	O
R&D1	O
was	O
involved	O
in	O
developing	O
the	O
Game	B-Device
Boy	I-Device
Color	I-Device
,	O
a	O
successor	O
to	O
the	O
original	B-Device
Game	I-Device
Boy	I-Device
with	O
a	O
color	O
screen	O
.	O
</s>
<s>
Nintendo	O
of	O
America	O
's	O
Dan	O
Owsen	O
noted	O
that	O
Nintendo	O
R&D1	O
included	O
a	O
special	O
"	O
Metroid	B-Device
palette	B-Data_Structure
"	O
in	O
the	O
Game	B-Device
Boy	I-Device
Color	I-Device
's	O
hardware	O
,	O
which	O
"	O
makes	O
Metroid	B-Application
II	I-Application
look	O
really	O
,	O
really	O
nice	O
on	O
Game	B-Device
Boy	I-Device
Color	I-Device
"	O
,	O
remarking	O
that	O
this	O
made	O
the	O
game	O
's	O
graphics	O
comparable	O
to	O
the	O
original	O
Metroid	B-Device
on	O
the	O
Nintendo	O
Entertainment	O
System	O
.	O
</s>
<s>
Metroid	B-Application
II	I-Application
was	O
released	O
in	O
North	O
America	O
in	O
November	O
1991	O
.	O
</s>
<s>
It	O
was	O
re-released	O
through	O
the	O
Nintendo	B-Application
Power	I-Application
service	O
in	O
Japan	O
on	O
March	O
1	O
,	O
2000	O
.	O
</s>
<s>
Metroid	B-Application
II	I-Application
,	O
along	O
with	O
other	O
Game	B-Device
Boy	I-Device
games	O
such	O
as	O
Super	B-Application
Mario	I-Application
Land	I-Application
2	I-Application
:	I-Application
6	I-Application
Golden	I-Application
Coins	I-Application
,	O
Mega	B-Application
Man	I-Application
:	I-Application
Dr.	I-Application
Wily	I-Application
's	I-Application
Revenge	I-Application
,	O
and	O
several	O
others	O
were	O
released	O
on	O
the	O
Nintendo	B-Operating_System
3DS	I-Operating_System
Virtual	B-Application
Console	I-Application
service	O
in	O
2011	O
.	O
</s>
<s>
An	O
unofficial	O
fangame	B-Application
remake	O
of	O
Metroid	B-Application
II	I-Application
,	O
AM2R	B-Application
,	O
short	O
for	O
Another	B-Application
Metroid	I-Application
2	I-Application
Remake	I-Application
(	O
the	O
name	O
being	O
a	O
reference	O
to	O
all	O
of	O
the	O
other	O
Metroid	B-Application
II	I-Application
remakes	I-Application
being	O
produced	O
at	O
the	O
time	O
)	O
,	O
was	O
developed	O
by	O
Milton	O
Guasti	O
,	O
under	O
the	O
pseudonym	O
DoctorM64	O
.	O
</s>
<s>
AM2R	B-Application
updates	O
the	O
game	O
's	O
appearance	O
by	O
drawing	O
upon	O
the	O
visual	O
designs	O
of	O
Super	B-Application
Metroid	I-Application
,	O
and	O
features	O
gameplay	O
modeled	O
after	O
Metroid	B-Application
:	I-Application
Zero	I-Application
Mission	I-Application
.	O
</s>
<s>
After	O
years	O
of	O
development	O
,	O
AM2R	B-Application
was	O
released	O
in	O
August	O
2016	O
for	O
Windows	O
,	O
coinciding	O
with	O
the	O
thirtieth	O
anniversary	O
of	O
the	O
Metroid	B-Device
series	O
.	O
</s>
<s>
Shortly	O
after	O
the	O
game	O
's	O
release	O
,	O
the	O
download	O
links	O
on	O
AM2R	B-Application
official	O
website	O
were	O
removed	O
after	O
Nintendo	O
sent	O
DMCA	O
notices	O
to	O
websites	O
hosting	O
it	O
,	O
although	O
Guasti	O
said	O
that	O
he	O
still	O
planned	O
to	O
continue	O
working	O
on	O
the	O
game	O
privately	O
.	O
</s>
<s>
Several	O
journalists	O
have	O
enjoyed	O
AM2R	B-Application
,	O
frequently	O
calling	O
it	O
impressive	O
and	O
commenting	O
on	O
the	O
improved	O
visuals	O
compared	O
to	O
those	O
of	O
Metroid	B-Application
II	I-Application
.	O
</s>
<s>
An	O
official	O
remake	O
of	O
Metroid	B-Application
II	I-Application
,	O
Metroid	B-Application
:	I-Application
Samus	I-Application
Returns	I-Application
,	O
was	O
developed	O
by	O
Nintendo	O
and	O
MercurySteam	O
and	O
released	O
for	O
the	O
Nintendo	B-Operating_System
3DS	I-Operating_System
on	O
September	O
15	O
,	O
2017	O
.	O
</s>
<s>
Although	O
considered	O
by	O
a	O
few	O
critics	O
to	O
be	O
the	O
weakest	O
game	O
in	O
the	O
franchise	O
and	O
not	O
as	O
well	O
received	O
as	O
the	O
Nintendo	O
Entertainment	O
System	O
counterpart	O
,	O
Metroid	B-Application
II	I-Application
still	O
received	O
generally	O
favorable	O
reviews	O
.	O
</s>
<s>
Because	O
Metroid	B-Application
II	I-Application
has	O
a	O
single	O
large	O
level	O
instead	O
of	O
multiple	O
small	O
ones	O
,	O
Tim	O
Jones	O
of	O
IGN	O
found	O
the	O
game	O
a	O
"	O
refreshing	O
departure	O
from	O
the	O
norm	O
"	O
,	O
which	O
made	O
him	O
feel	O
claustrophobic	O
the	O
further	O
into	O
the	O
game	O
he	O
ventured	O
.	O
</s>
<s>
He	O
praised	O
Metroid	B-Application
IIs	I-Application
replay	O
value	O
,	O
considering	O
its	O
non-linearity	O
as	O
the	O
primary	O
reason	O
for	O
this	O
.	O
</s>
<s>
In	O
their	O
retrospective	O
video	O
on	O
the	O
Metroid	B-Device
series	O
,	O
GameTrailers	O
believed	O
that	O
the	O
game	O
still	O
maintained	O
the	O
high	O
standards	O
set	O
by	O
its	O
predecessor	O
and	O
noted	O
that	O
it	O
also	O
introduced	O
new	O
methods	O
of	O
exploration	O
to	O
the	O
series	O
that	O
have	O
become	O
staples	O
.	O
</s>
<s>
Marcel	O
Van	O
Duyn	O
of	O
Nintendo	O
Life	O
writes	O
that	O
Metroid	B-Application
II	I-Application
"	O
expands	O
on	O
the	O
original	O
title	O
quite	O
nicely	O
"	O
,	O
and	O
noted	O
that	O
the	O
difficulty	O
was	O
improved	O
over	O
the	O
original	O
Metroid	B-Device
because	O
of	O
the	O
inclusion	O
of	O
"	O
hot	O
spots	O
"	O
that	O
restores	O
health	O
and	O
missiles	O
.	O
</s>
<s>
On	O
the	O
other	O
hand	O
,	O
Jeremy	O
Parish	O
of	O
1UP.com	O
was	O
particularly	O
critical	O
of	O
Metroid	B-Application
II	I-Application
,	O
finding	O
the	O
game	O
painful	O
to	O
play	O
and	O
describing	O
it	O
as	O
"	O
something	O
of	O
a	O
dark	O
spot	O
on	O
a	O
brilliant	O
series	O
 '	O
reputation	O
"	O
.	O
</s>
<s>
However	O
,	O
Parish	O
found	O
the	O
game	O
's	O
premise	O
"	O
ambitious	O
"	O
,	O
adding	O
that	O
it	O
provided	O
the	O
series	O
a	O
vital	O
crux	O
,	O
as	O
Samus	O
 '	O
actions	O
in	O
Metroid	B-Application
II	I-Application
set	O
the	O
plot	O
for	O
Super	B-Application
Metroid	I-Application
and	O
Metroid	B-Application
Fusion	I-Application
.	O
</s>
<s>
Van	O
Duyn	O
praised	O
Metroid	B-Application
II	I-Application
visual	O
detail	O
,	O
writing	O
that	O
the	O
foregrounds	O
and	O
the	O
enemies	O
are	O
detailed	O
so	O
players	O
can	O
identify	O
them	O
easily	O
.	O
</s>
<s>
In	O
September	O
of	O
1997	O
,	O
12	O
Nintendo	B-Application
Power	I-Application
staff	O
members	O
voted	O
in	O
a	O
list	O
for	O
the	O
top	O
100	O
games	O
of	O
all	O
time	O
.	O
</s>
<s>
The	O
magazine	O
placed	O
Metroid	B-Application
II	I-Application
at	O
34th	O
place	O
on	O
their	O
list	O
of	O
top	O
100	O
games	O
of	O
all	O
time	O
.	O
</s>
<s>
In	O
their	O
Top	O
200	O
Games	O
list	O
,	O
Nintendo	B-Application
Power	I-Application
also	O
ranked	O
the	O
game	O
as	O
the	O
85th	O
best	O
game	O
on	O
a	O
Nintendo	O
console	O
,	O
and	O
Videogames.com	O
included	O
it	O
in	O
their	O
list	O
of	O
the	O
best	O
Game	B-Device
Boy	I-Device
games	O
.	O
</s>
<s>
Nintendo	B-Application
Power	I-Application
listed	O
it	O
as	O
the	O
12th-best	O
Game	O
Boy/Game	O
Boy	O
Color	O
video	O
game	O
,	O
praising	O
it	O
for	O
introducing	O
several	O
staple	O
abilities	O
to	O
the	O
series	O
.	O
</s>
<s>
Game	O
Informers	O
Ben	O
Reeves	O
called	O
it	O
the	O
ninth	O
best	O
Game	B-Device
Boy	I-Device
game	O
and	O
noted	O
that	O
it	O
polarized	O
fans	O
.	O
</s>
<s>
Super	B-Application
Metroid	I-Application
,	O
the	O
third	O
installment	O
of	O
the	O
Metroid	B-Device
series	O
,	O
was	O
released	O
for	O
the	O
Super	B-Application
Nintendo	I-Application
Entertainment	I-Application
System	I-Application
in	O
1994	O
.	O
</s>
<s>
The	O
game	O
's	O
story	O
takes	O
place	O
after	O
the	O
events	O
of	O
Metroid	B-Application
II	I-Application
,	O
and	O
follows	O
Samus	O
as	O
she	O
travels	O
to	O
planet	O
Zebes	O
in	O
an	O
attempt	O
to	O
retrieve	O
an	O
infant	O
Metroid	B-Device
stolen	O
by	O
Ridley	O
.	O
</s>
<s>
Metroid	B-Device
director	O
Yoshio	O
Sakamoto	O
said	O
at	O
the	O
2010	O
Game	O
Developers	O
Conference	O
that	O
he	O
was	O
"	O
very	O
moved	O
"	O
by	O
the	O
ending	O
of	O
Metroid	B-Application
II	I-Application
,	O
which	O
motivated	O
him	O
to	O
create	O
Super	B-Application
Metroid	I-Application
.	O
</s>
