<s>
Mega	B-Application
Man	I-Application
4	I-Application
(	O
stylized	O
as	O
MEGA	O
MAN	O
IV	O
)	O
is	O
an	O
action-platform	O
game	O
developed	O
by	O
Capcom	O
for	O
the	O
Nintendo	O
Entertainment	O
System	O
.	O
</s>
<s>
The	O
game	O
's	O
story	O
takes	O
place	O
after	O
the	B-Application
third	I-Application
defeat	I-Application
and	I-Application
supposed	I-Application
death	I-Application
of	O
Dr.	O
Wily	O
,	O
and	O
features	O
the	O
Earth	O
coming	O
under	O
threat	O
from	O
a	O
mysterious	O
scientist	O
named	O
Dr.	O
Cossack	O
and	O
his	O
eight	O
"	O
Robot	O
Masters	O
"	O
.	O
</s>
<s>
Mega	B-Application
Man	I-Application
4	I-Application
carries	O
on	O
the	O
same	O
action	B-Application
and	O
platforming	O
gameplay	O
as	O
the	O
first	O
three	O
games	O
,	O
in	O
which	O
the	O
player	O
completes	O
a	O
series	O
of	O
stages	O
in	O
any	O
order	O
and	O
adds	O
the	O
weapon	O
of	O
each	O
stage	O
's	O
boss	O
to	O
Mega	O
Man	O
's	O
arsenal	O
.	O
</s>
<s>
Similarly	O
to	O
its	O
predecessors	O
Mega	B-Application
Man	I-Application
4	I-Application
was	O
remade	O
for	O
PlayStation	B-Device
in	O
Japan	O
.	O
</s>
<s>
In	O
later	O
years	O
it	O
appeared	O
on	O
mobile	O
phones	O
and	O
as	O
part	O
of	O
game	O
compilations	O
,	O
including	O
Mega	B-Device
Man	I-Device
Anniversary	I-Device
Collection	I-Device
.	O
</s>
<s>
The	O
emulated	O
versions	O
were	O
also	O
released	O
through	O
PlayStation	B-Device
Network	I-Device
and	O
Virtual	B-Application
Console	I-Application
.	O
</s>
<s>
A	O
sequel	O
,	O
Mega	B-Application
Man	I-Application
5	I-Application
,	O
was	O
released	O
in	O
1992	O
.	O
</s>
<s>
Mega	B-Application
Man	I-Application
4	I-Application
takes	O
place	O
in	O
an	O
unspecified	O
year	O
during	O
the	O
21st	O
century	O
,	O
described	O
as	O
the	O
year	O
"	O
20XX	O
"	O
.	O
</s>
<s>
One	O
year	O
after	O
the	O
events	O
of	O
Mega	B-Application
Man	I-Application
3	I-Application
,	O
a	O
mysterious	O
Russian	O
scientist	O
named	O
Dr.	O
Cossack	O
unleashes	O
an	O
army	O
of	O
robots	O
with	O
the	O
intention	O
of	O
world	O
domination	O
,	O
much	O
like	O
Dr.	O
Wily	O
before	O
him	O
.	O
</s>
<s>
Mega	B-Application
Man	I-Application
4	I-Application
features	O
similar	O
gameplay	O
to	O
the	O
previous	O
three	O
games	O
.	O
</s>
<s>
The	O
protagonist	O
,	O
Mega	O
Man	O
,	O
is	O
able	O
to	O
run	O
,	O
jump	O
,	O
shoot	O
,	O
and	O
climb	O
his	O
way	O
past	O
obstacles	O
and	O
enemies	O
;	O
the	O
game	O
also	O
retains	O
the	O
slide	O
ability	O
which	O
debuted	O
in	O
Mega	B-Application
Man	I-Application
3	I-Application
.	O
</s>
<s>
One	O
major	O
addition	O
to	O
the	O
gameplay	O
in	O
Mega	B-Application
Man	I-Application
4	I-Application
is	O
the	O
"	O
Mega	O
Buster	O
"	O
,	O
an	O
upgraded	O
version	O
of	O
Mega	O
Man	O
's	O
arm	O
cannon	O
.	O
</s>
<s>
The	O
hero	O
's	O
dog	O
Rush	O
makes	O
a	O
return	O
from	O
Mega	B-Application
Man	I-Application
3	I-Application
with	O
the	O
ability	O
to	O
transform	O
into	O
"	O
Coil	O
"	O
,	O
"	O
Jet	O
"	O
,	O
and	O
"	O
Marine	O
"	O
modes	O
for	O
navigating	O
different	O
environments	O
.	O
</s>
<s>
The	O
character	O
"	O
Flip	O
Top	O
"	O
Eddie	O
is	O
introduced	O
in	O
Mega	B-Application
Man	I-Application
4	I-Application
.	O
</s>
<s>
Mega	O
Man	O
series	O
artist	O
Keiji	O
Inafune	O
,	O
credited	O
as	O
"	O
Inafking	O
"	O
,	O
stated	O
that	O
the	O
development	O
team	O
had	O
very	O
few	O
problems	O
while	O
working	O
on	O
Mega	B-Application
Man	I-Application
4	I-Application
.	O
</s>
<s>
The	O
idea	O
for	O
Eddie	O
originally	O
came	O
about	O
during	O
the	O
development	O
of	O
Mega	B-Application
Man	I-Application
2	I-Application
.	O
</s>
<s>
Mega	B-Application
Man	I-Application
4	I-Application
was	O
the	O
first	O
game	O
in	O
the	O
series	O
for	O
Hayato	O
Kaji	O
,	O
credited	O
as	O
"	O
K	O
.	O
Hayato	O
"	O
,	O
a	O
prominent	O
designer	O
for	O
many	O
later	O
Mega	O
Man	O
games	O
.	O
</s>
<s>
The	O
Robot	O
Masters	O
in	O
Mega	B-Application
Man	I-Application
4	I-Application
are	O
a	O
result	O
of	O
a	O
design	O
contest	O
for	O
fans	O
held	O
in	O
Japan	O
.	O
</s>
<s>
The	O
winning	O
eight	O
contestants	O
of	O
the	O
design	O
contest	O
were	O
each	O
issued	O
a	O
special	O
"	O
golden	O
cartridge	O
"	O
edition	O
of	O
Mega	B-Application
Man	I-Application
4	I-Application
.	O
</s>
<s>
The	O
musical	O
score	O
for	O
Mega	B-Application
Man	I-Application
4	I-Application
was	O
composed	O
by	O
Minae	O
Fujii	O
,	O
credited	O
as	O
"	O
Ojalin	O
"	O
,	O
while	O
the	O
sound	O
programming	O
and	O
sound	O
effects	O
were	O
handled	O
by	O
Yasuaki	O
Fujita	O
,	O
credited	O
as	O
"	O
Bun	O
Bun	O
"	O
,	O
who	O
had	O
composed	O
the	O
soundtrack	O
for	O
Mega	B-Application
Man	I-Application
3	I-Application
the	O
previous	O
year	O
.	O
</s>
<s>
Mega	B-Application
Man	I-Application
4	I-Application
has	O
received	O
mostly	O
positive	O
critical	O
reviews	O
.	O
</s>
<s>
Reviews	O
contemporary	O
with	O
the	O
game	O
's	O
release	O
by	O
the	O
United	O
States	O
magazine	O
Nintendo	B-Application
Power	I-Application
and	O
the	O
United	O
Kingdom	O
publications	O
Nintendo	O
Magazine	O
System	O
and	O
Total	O
!	O
</s>
<s>
all	O
found	O
Mega	B-Application
Man	I-Application
4	I-Application
to	O
have	O
high	O
quality	O
graphics	O
,	O
sound	O
,	O
and	O
gameplay	O
.	O
</s>
<s>
"	O
Mega	B-Application
Man	I-Application
4	I-Application
continues	O
the	O
tradition	O
—	O
crazed	O
robot	O
baddies	O
,	O
good	O
character	O
graphics	O
,	O
great	O
background	O
art	O
and	O
warped	O
,	O
mechanical	O
music	O
,	O
"	O
the	O
reviewer	O
said	O
.	O
</s>
<s>
Capcom	O
sticks	O
to	O
the	O
blueprints	O
in	O
Mega	B-Application
Man	I-Application
4	I-Application
—	O
guaranteeing	O
happiness	O
for	O
Mega	O
Man	O
fans	O
everywhere.	O
"	O
</s>
<s>
Mega	B-Application
Man	I-Application
4	I-Application
made	O
it	O
into	O
IGN	O
's	O
"	O
Top	O
100	O
NES	O
Games	O
"	O
list	O
at	O
number	O
95	O
,	O
with	O
staff	O
writer	O
Matt	O
Casamassina	O
praising	O
its	O
attempt	O
at	O
better	O
narrative	O
and	O
an	O
essentially	O
similar	O
experience	O
to	O
the	O
first	O
three	O
Mega	O
Man	O
games	O
.	O
</s>
<s>
Nutt	O
and	O
Speer	O
admitted	O
that	O
the	O
series	O
was	O
beginning	O
to	O
deteriorate	O
with	O
this	O
game	O
,	O
likely	O
due	O
to	O
the	O
growing	O
reputation	O
of	O
the	O
more	O
powerful	O
Super	B-Application
Nintendo	I-Application
Entertainment	I-Application
System	I-Application
at	O
the	O
time	O
of	O
its	O
release	O
.	O
</s>
<s>
Thomas	O
identified	O
the	O
chargeable	O
Mega	O
Buster	O
as	O
disrupting	O
the	O
balance	O
of	O
the	O
game	O
and	O
rendering	O
many	O
of	O
the	O
Master	O
Weapons	O
useless	O
,	O
one	O
of	O
the	O
concepts	O
that	O
set	O
the	O
Mega	O
Man	O
games	O
apart	O
from	O
other	O
action-platformers	O
.	O
</s>
<s>
Mega	B-Application
Man	I-Application
4	I-Application
was	O
re-released	O
for	O
the	O
PlayStation	B-Device
as	O
part	O
of	O
the	O
Rockman	O
Complete	O
Works	O
series	O
in	O
1999	O
.	O
</s>
<s>
A	O
port	O
of	O
the	O
Complete	O
Works	O
edition	O
was	O
released	O
on	O
the	O
PlayStation	B-Device
2	I-Device
and	O
Nintendo	B-Application
GameCube	I-Application
in	O
2004	O
and	O
the	O
Xbox	B-Application
in	O
2005	O
,	O
as	O
part	O
of	O
the	O
North	O
American-exclusive	O
Mega	B-Device
Man	I-Device
Anniversary	I-Device
Collection	I-Device
.	O
</s>
<s>
The	O
NES	O
version	O
has	O
also	O
been	O
re-released	O
on	O
Japanese	O
i-mode	O
mobile	O
phones	O
in	O
2005	O
,	O
worldwide	O
on	O
the	B-Operating_System
Wii	I-Operating_System
's	O
downloadable	O
Virtual	B-Application
Console	I-Application
service	O
in	O
2010	O
,	O
and	O
on	O
the	O
Japanese	O
PlayStation	B-Device
Network	I-Device
in	O
2011	O
.	O
</s>
