<s>
is	O
a	O
1993	O
platform	O
game	O
developed	O
by	O
Sega	O
for	O
the	O
Sega	B-Device
CD	I-Device
.	O
</s>
<s>
As	O
Sonic	B-Application
the	I-Application
Hedgehog	I-Application
,	O
the	O
player	O
attempts	O
to	O
protect	O
an	O
extraterrestrial	O
body	O
,	O
Little	B-Application
Planet	I-Application
,	O
from	O
Doctor	O
Robotnik	O
.	O
</s>
<s>
Like	O
other	O
Sonic	B-Application
games	O
,	O
Sonic	B-Application
runs	O
through	O
themed	O
levels	O
while	O
collecting	O
rings	O
and	O
defeating	O
robots	O
.	O
</s>
<s>
Sonic	B-Application
CD	I-Application
introduces	O
time	O
travel	O
as	O
a	O
game	O
mechanic	O
.	O
</s>
<s>
Sonic	B-Application
CD	I-Application
began	O
as	O
a	O
port	O
of	O
the	O
Sega	B-Operating_System
Genesis	I-Operating_System
game	O
Sonic	B-Application
the	I-Application
Hedgehog	I-Application
(	O
1991	O
)	O
,	O
but	O
developed	O
into	O
a	O
separate	O
project	O
.	O
</s>
<s>
Led	O
by	O
Sonic	B-Application
co-creator	O
Naoto	O
Ohshima	O
,	O
the	O
developers	O
sought	O
to	O
show	O
off	O
the	O
technical	O
capabilities	O
of	O
the	O
Sega	B-Device
CD	I-Device
.	O
</s>
<s>
Sonic	B-Application
CD	I-Application
features	O
the	O
debuts	O
of	O
the	O
recurring	O
Sonic	B-Application
characters	O
Amy	O
Rose	O
and	O
Metal	O
Sonic	B-Application
,	O
and	O
includes	O
animated	O
cutscenes	O
.	O
</s>
<s>
Sonic	B-Application
CD	I-Application
was	O
released	O
in	O
late	O
1993	O
.	O
</s>
<s>
It	O
received	O
critical	O
acclaim	O
and	O
is	O
often	O
called	O
one	O
of	O
the	O
best	O
Sonic	B-Application
and	O
platform	O
games	O
.	O
</s>
<s>
Reviewers	O
praised	O
its	O
size	O
,	O
music	O
,	O
and	O
time	O
travel	O
feature	O
,	O
although	O
some	O
felt	O
it	O
did	O
not	O
fully	O
use	O
the	O
Sega	B-Device
CD	I-Device
's	O
capabilities	O
.	O
</s>
<s>
It	O
sold	O
over	O
1.5	O
million	O
copies	O
,	O
making	O
it	O
the	O
bestselling	O
Sega	B-Device
CD	I-Device
game	O
.	O
</s>
<s>
Sonic	B-Application
CD	I-Application
was	O
ported	O
to	O
Windows	O
as	O
part	O
of	O
the	O
Sega	O
PC	O
brand	O
in	O
1996	O
,	O
and	O
to	O
the	O
PlayStation	B-Device
2	I-Device
and	O
GameCube	B-Application
as	O
part	O
of	O
Sonic	B-Application
Gems	I-Application
Collection	I-Application
in	O
2005	O
.	O
</s>
<s>
A	O
remake	O
,	O
developed	O
by	O
Christian	O
Whitehead	O
using	O
the	O
Retro	B-Application
Engine	I-Application
,	O
was	O
released	O
for	O
various	O
platforms	O
in	O
2011	O
and	O
rereleased	O
as	O
part	O
of	O
the	O
Sonic	B-Device
Origins	I-Device
compilation	O
in	O
2022	O
.	O
</s>
<s>
Sonic	B-Application
CD	I-Application
is	O
a	O
side-scrolling	O
platform	O
game	O
similar	O
to	O
the	O
original	O
Sonic	B-Application
the	I-Application
Hedgehog	I-Application
.	O
</s>
<s>
Players	O
control	O
Sonic	B-Application
the	I-Application
Hedgehog	I-Application
as	O
he	O
ventures	O
to	O
stop	O
his	O
nemesis	O
Doctor	O
Robotnik	O
from	O
obtaining	O
the	O
magical	O
Time	O
Stones	O
and	O
conquering	O
a	O
Little	B-Application
Planet	I-Application
.	O
</s>
<s>
Like	O
previous	O
games	O
,	O
Sonic	B-Application
can	O
destroy	O
enemies	O
and	O
objects	O
(	O
such	O
as	O
certain	O
walls	O
and	O
television	O
monitors	O
containing	O
power-ups	O
)	O
by	O
rolling	O
into	O
a	O
ball	O
,	O
and	O
collects	O
rings	O
as	O
a	O
form	O
of	O
health	O
.	O
</s>
<s>
Sonic	B-Application
can	O
also	O
perform	O
a	O
"	O
spin	O
dash	O
"	O
and	O
a	O
"	O
super	O
peel-out	O
"	O
,	O
both	O
of	O
which	O
increase	O
his	O
speed	O
.	O
</s>
<s>
In	O
the	O
first	O
and	O
second	B-Application
games	O
,	O
the	O
levels	O
were	O
named	O
zones	O
,	O
but	O
in	O
this	O
game	O
,	O
they	O
're	O
named	O
rounds	O
,	O
the	O
previously-named	O
acts	O
now	O
named	O
zones	O
instead	O
.	O
</s>
<s>
Players	O
start	O
with	O
three	O
lives	O
,	O
which	O
are	O
lost	O
when	O
they	O
suffer	O
any	O
type	O
of	O
damage	O
without	O
rings	O
in	O
their	O
possession	O
;	O
losing	O
all	O
lives	O
results	O
in	O
a	O
game	B-Application
over	I-Application
.	O
</s>
<s>
Sonic	B-Application
CD	I-Application
is	O
differentiated	O
from	O
other	O
Sonic	B-Application
games	O
through	O
its	O
time	O
travel	O
game	O
mechanic	O
,	O
which	O
allows	O
players	O
to	O
access	O
different	O
versions	O
of	O
rounds	O
set	O
in	O
the	O
past	O
,	O
present	O
and	O
future	O
.	O
</s>
<s>
Sonic	B-Application
starts	O
the	O
first	O
two	O
zones	O
in	O
the	O
present	O
.	O
</s>
<s>
By	O
default	O
,	O
future	O
stages	O
are	O
neglected	O
and	O
littered	O
with	O
machinery	O
after	O
Robotnik	O
has	O
conquered	O
the	O
Little	B-Application
Planet	I-Application
,	O
appropriately	O
named	O
"	O
bad	O
futures.	O
"	O
</s>
<s>
By	O
finishing	O
a	O
level	O
with	O
more	O
than	O
50	O
rings	O
,	O
Sonic	B-Application
can	O
access	O
a	O
special	O
stage	O
,	O
in	O
which	O
he	O
must	O
destroy	O
six	O
UFOs	B-Application
in	O
a	O
pseudo-3D	O
environment	O
within	O
a	O
time	O
limit	O
.	O
</s>
<s>
Time	O
is	O
reduced	O
swiftly	O
if	O
the	O
player	O
runs	O
through	O
water	O
,	O
though	O
a	O
special	O
UFO	B-Application
which	O
appears	O
when	O
time	O
is	O
running	O
out	O
grants	O
extra	O
time	O
if	O
destroyed	O
.	O
</s>
<s>
If	O
the	O
player	O
destroys	O
all	O
the	O
UFOs	B-Application
before	O
the	O
time	O
runs	O
out	O
,	O
they	O
earn	O
a	O
Time	O
Stone	O
.	O
</s>
<s>
The	O
game	O
also	O
includes	O
a	O
save	O
feature	O
,	O
which	O
uses	O
the	O
back-up	O
memory	O
of	O
the	O
Sega	B-Device
CD	I-Device
.	O
</s>
<s>
Some	O
time	O
after	O
his	O
first	O
adventure	O
,	O
Sonic	B-Application
CD	I-Application
opens	O
with	O
Sonic	B-Application
rushing	O
to	O
Never	O
Lake	O
,	O
where	O
an	O
extraterrestrial	O
body	O
,	O
Little	B-Application
Planet	I-Application
,	O
appears	O
in	O
the	O
last	O
month	O
of	O
every	O
year	O
.	O
</s>
<s>
Sonic	B-Application
ventures	O
into	O
the	O
planet	O
,	O
followed	O
by	O
the	O
besotted	O
Amy	O
Rose	O
,	O
his	O
self-proclaimed	O
girlfriend	O
.	O
</s>
<s>
Robotnik	O
dispatches	O
his	O
newest	O
invention	O
,	O
Metal	O
Sonic	B-Application
,	O
to	O
kidnap	O
Amy	O
at	O
Collision	O
Chaos	O
,	O
luring	O
Sonic	B-Application
into	O
danger	O
.	O
</s>
<s>
After	O
outrunning	O
Metal	O
Sonic	B-Application
in	O
Stardust	O
Speedway	O
and	O
saving	O
Amy	O
,	O
Sonic	B-Application
fights	O
and	O
defeats	O
Robotnik	O
in	O
his	O
lair	O
,	O
Metallic	O
Madness	O
.	O
</s>
<s>
In	O
the	O
good	O
ending	O
,	O
Little	B-Application
Planet	I-Application
thanks	O
Sonic	B-Application
with	O
a	O
shower	O
of	O
stars	O
and	O
leaves	O
Never	O
Lake	O
;	O
in	O
the	O
bad	O
ending	O
,	O
Little	B-Application
Planet	I-Application
still	O
leaves	O
,	O
but	O
Robotnik	O
uses	O
the	O
Time	O
Stones	O
to	O
bring	O
it	O
back	O
and	O
the	O
player	O
is	O
urged	O
to	O
replay	O
the	O
game	O
to	O
achieve	O
the	O
good	O
ending	O
.	O
</s>
<s>
The	O
original	O
Sonic	B-Application
the	I-Application
Hedgehog	I-Application
(	O
1991	O
)	O
was	O
developed	O
by	O
Sonic	B-Application
Team	O
at	O
Sega	O
.	O
</s>
<s>
The	O
lead	O
programmer	O
,	O
Yuji	O
Naka	O
,	O
dissatisfied	O
with	O
Sega	O
of	O
Japan	O
's	O
rigid	O
corporate	O
policies	O
,	O
moved	O
with	O
several	O
members	O
of	O
Sonic	B-Application
Team	O
to	O
the	O
United	O
States	O
to	O
develop	O
Sonic	B-Application
the	I-Application
Hedgehog	I-Application
2	I-Application
with	O
Sega	O
Technical	O
Institute	O
(	O
STI	O
)	O
.	O
</s>
<s>
Meanwhile	O
,	O
Sega	O
planned	O
to	O
release	O
the	O
Sega	B-Device
CD	I-Device
add-on	O
for	O
its	O
Genesis	B-Operating_System
,	O
and	O
wanted	O
a	O
Sonic	B-Application
game	O
that	O
would	O
demonstrate	O
its	O
more	O
advanced	O
features	O
.	O
</s>
<s>
Naoto	O
Ohshima	O
,	O
the	O
designer	O
of	O
Sonic	B-Application
,	O
was	O
Sonic	B-Application
CDs	I-Application
director	O
;	O
the	O
remainder	O
of	O
the	O
team	O
comprised	O
Sega	O
staff	O
who	O
had	O
developed	O
The	B-Application
Revenge	I-Application
of	I-Application
Shinobi	I-Application
,	O
Golden	B-Application
Axe	I-Application
2	I-Application
,	O
and	O
Streets	B-Application
of	I-Application
Rage	I-Application
.	O
</s>
<s>
The	O
team	O
built	O
Sonic	B-Application
CD	I-Application
using	O
the	O
original	O
Sonic	B-Application
the	I-Application
Hedgehog	I-Application
code	O
as	O
a	O
base	O
.	O
</s>
<s>
Sonic	B-Application
CD	I-Application
was	O
conceived	O
as	O
an	O
enhanced	O
port	O
of	O
Sonic	B-Application
the	I-Application
Hedgehog	I-Application
for	O
the	O
Sega	B-Device
CD	I-Device
,	O
but	O
it	O
gradually	O
developed	O
into	O
a	O
separate	O
project	O
.	O
</s>
<s>
It	O
was	O
titled	O
CD	O
Sonic	B-Application
the	I-Application
Hedgehog	I-Application
first	O
before	O
being	O
renamed	O
Sonic	B-Application
CD	I-Application
.	O
</s>
<s>
Ohshima	O
does	O
not	O
consider	O
Sonic	B-Application
CD	I-Application
a	O
sequel	O
to	O
Sonic	B-Application
the	I-Application
Hedgehog	I-Application
or	O
Sonic	B-Application
2	I-Application
,	O
although	O
the	O
artist	O
Yasushi	O
Yamaguchi	O
said	O
its	O
story	O
may	O
be	O
set	O
between	O
the	O
two	O
.	O
</s>
<s>
Sonic	B-Application
the	I-Application
Hedgehog	I-Application
had	O
a	O
balance	O
on	O
speed	O
and	O
platforming	O
;	O
STI	O
built	O
on	O
the	O
speed	O
with	O
Sonic	B-Application
2s	I-Application
more	O
focused	O
level	O
designs	O
.	O
</s>
<s>
According	O
to	O
artist	O
Kazuyuki	O
Hoshino	O
,	O
because	O
it	O
was	O
a	O
Sega	B-Device
CD	I-Device
game	O
,	O
the	O
team	O
wanted	O
Sonic	B-Application
CD	I-Application
to	O
stand	O
out	O
compared	O
to	O
previous	O
Sonic	B-Application
games	O
.	O
</s>
<s>
Visually	O
,	O
the	O
game	O
was	O
designed	O
to	O
resemble	O
CG	O
imagery	O
;	O
the	O
Sonic	B-Application
sprite	O
on	O
the	O
title	O
screen	O
was	O
based	O
on	O
a	O
Sonic	B-Application
figurine	O
by	O
Taku	O
Makino	O
that	O
the	O
team	O
photographed	O
and	O
scanned	O
.	O
</s>
<s>
Sonic	B-Application
CD	I-Application
marks	O
the	O
debuts	O
of	O
Amy	O
Rose	O
and	O
Metal	O
Sonic	B-Application
,	O
both	O
designed	O
by	O
Hoshino	O
.	O
</s>
<s>
Hoshino	O
designed	O
Metal	O
Sonic	B-Application
in	O
response	O
to	O
Ohshima	O
wanting	O
a	O
strong	O
rival	O
for	O
Sonic	B-Application
.	O
</s>
<s>
Hoshino	O
had	O
a	O
clear	O
image	O
of	O
Metal	O
Sonic	B-Application
in	O
his	O
mind	O
from	O
the	O
moment	O
he	O
was	O
briefed	O
,	O
and	O
his	O
design	O
emerged	O
after	O
only	O
a	O
few	O
sketches	O
.	O
</s>
<s>
The	O
character	O
graphics	O
were	O
created	O
using	O
Sega	O
's	O
proprietary	O
graphics	O
system	O
for	O
the	O
Genesis	B-Operating_System
,	O
the	O
"	O
Sega	O
Digitizer	O
MK-III	O
"	O
,	O
featuring	O
a	O
bitmap	O
and	O
animation	O
editor	O
.	O
</s>
<s>
The	O
team	O
mostly	O
used	O
Macintosh	B-Device
IIcis	I-Device
.	O
</s>
<s>
Though	O
Naka	O
was	O
not	O
directly	O
involved	O
with	O
Sonic	B-Application
CD	I-Application
,	O
he	O
exchanged	O
design	O
ideas	O
with	O
Ohshima	O
.	O
</s>
<s>
Ohshima	O
cited	O
the	O
film	O
Back	B-Application
to	I-Application
the	I-Application
Future	I-Application
(	O
1985	O
)	O
as	O
an	O
influence	O
on	O
the	O
time	O
travel	O
.	O
</s>
<s>
Ohshima	O
hoped	O
for	O
the	O
time	O
period	O
to	O
change	O
instantly	O
with	O
a	O
"	O
sonic	B-Application
boom	O
"	O
effect	O
,	O
but	O
the	O
programmers	O
argued	O
this	O
was	O
impossible	O
and	O
produced	O
a	O
loading	O
sequence	O
instead	O
.	O
</s>
<s>
Sega	O
did	O
not	O
pressure	O
the	O
team	O
developing	O
Sonic	B-Application
CD	I-Application
as	O
much	O
as	O
the	O
one	O
developing	O
Sonic	B-Application
2	I-Application
.	O
</s>
<s>
Ohshima	O
felt	O
this	O
was	O
because	O
Sonic	B-Application
CD	I-Application
is	O
not	O
a	O
numbered	O
sequel	O
;	O
he	O
considered	O
it	O
a	O
recreation	O
of	O
the	O
original	O
game	O
.	O
</s>
<s>
The	O
total	O
game	O
data	O
of	O
Sonic	B-Application
CD	I-Application
is	O
21	O
megabytes	O
(	O
MB	O
)	O
,	O
compared	O
to	O
Sonic	B-Application
2s	I-Application
1	O
MB	O
.	O
</s>
<s>
The	O
game	O
includes	O
animated	O
cutscenes	O
produced	O
by	O
Studio	O
Junio	O
;	O
the	O
team	O
used	O
a	O
format	O
that	O
provided	O
uncompressed	O
imagery	O
to	O
the	O
video	O
display	O
processor	O
,	O
which	O
allowed	O
for	O
superior	O
results	O
in	O
contrast	O
to	O
the	O
Cinepak	B-Algorithm
compression	I-Algorithm
used	O
for	O
other	O
Sega	B-Device
CD	I-Device
games	O
.	O
</s>
<s>
The	O
Japanese	O
soundtrack	O
was	O
composed	O
by	O
Naofumi	O
Hataya	O
and	O
Masafumi	O
Ogata	O
,	O
who	O
had	O
worked	O
together	O
on	O
the	O
8-bit	O
version	O
of	O
Sonic	B-Application
the	I-Application
Hedgehog	I-Application
2	I-Application
.	O
</s>
<s>
The	O
game	O
features	O
two	O
songs	O
:	O
"	O
Sonic	B-Application
—	O
You	O
Can	O
Do	O
Anything	O
"	O
,	O
often	O
referred	O
to	O
as	O
"	O
Toot	O
Toot	O
Sonic	B-Application
Warrior	O
"	O
,	O
composed	O
by	O
Ogata	O
and	O
originally	O
written	O
for	O
Sonic	B-Application
the	I-Application
Hedgehog	I-Application
2	I-Application
,	O
and	O
"	O
Cosmic	O
Eternity	O
—	O
Believe	O
in	O
Yourself	O
"	O
,	O
composed	O
by	O
Hataya	O
.	O
</s>
<s>
Sega	O
of	O
America	O
delayed	O
the	O
North	O
American	O
release	O
of	O
Sonic	B-Application
CD	I-Application
for	O
two	O
months	O
to	O
have	O
a	O
new	O
soundtrack	O
written	O
and	O
produced	O
by	O
Spencer	O
Nilsen	O
and	O
David	O
Young	O
of	O
Sega	O
Multimedia	O
Studio	O
.	O
</s>
<s>
According	O
to	O
Nilsen	O
,	O
Sega	O
's	O
American	O
marketing	O
division	O
believed	O
Sonic	B-Application
CD	I-Application
needed	O
a	O
more	O
"	O
rich	O
and	O
complex	O
"	O
soundtrack	O
and	O
a	O
theme	O
song	O
they	O
could	O
use	O
to	O
promote	O
it	O
.	O
</s>
<s>
"	O
You	O
Can	O
Do	O
Anything	O
"	O
was	O
replaced	O
with	O
"	O
Sonic	B-Application
Boom	O
"	O
,	O
composed	O
by	O
Nilsen	O
and	O
performed	O
by	O
the	O
female	O
vocal	O
group	O
Pastiche	O
.	O
</s>
<s>
The	O
tracks	O
in	O
the	O
"	O
Past	O
"	O
stages	O
could	O
not	O
be	O
replaced	O
as	O
they	O
were	O
sequenced	O
PCM	B-Algorithm
audio	I-Algorithm
tracks	O
rather	O
than	O
streamed	O
Mixed	O
Mode	O
CD	O
audio	O
.	O
</s>
<s>
Sonic	B-Application
CD	I-Application
was	O
released	O
in	O
Japan	O
on	O
September	O
23	O
,	O
1993	O
,	O
and	O
Europe	O
in	O
October	O
1993	O
.	O
</s>
<s>
Sonic	B-Application
CD	I-Application
was	O
the	O
flagship	O
game	O
for	O
Sega	B-Device
CD	I-Device
and	O
its	O
only	O
Sonic	B-Application
game	O
.	O
</s>
<s>
An	O
enhanced	O
version	O
of	O
the	O
original	O
Sonic	B-Application
the	I-Application
Hedgehog	I-Application
and	O
a	O
Sonic-themed	O
localization	O
of	O
Popful	O
Mail	O
were	O
canceled	O
.	O
</s>
<s>
Two	O
versions	O
of	O
Sonic	B-Application
CD	I-Application
were	O
released	O
for	O
Windows	O
:	O
one	O
in	O
1995	O
for	O
Pentium	B-Device
processors	I-Device
,	O
and	O
another	O
in	O
1996	O
for	O
DirectX	B-Application
.	O
</s>
<s>
The	O
Pentium	B-Device
version	O
was	O
only	O
bundled	O
with	O
new	O
computers	O
and	O
never	O
sold	O
in	O
stores	O
;	O
Sega	O
worked	O
with	O
Intel	O
to	O
make	O
the	O
game	O
work	O
properly	O
.	O
</s>
<s>
The	O
DirectX	B-Application
version	O
was	O
released	O
under	O
the	O
Sega	O
PC	O
brand	O
and	O
distributed	O
by	O
SoftKey	B-General_Concept
in	O
North	O
America	O
on	O
July	O
8	O
and	O
in	O
Japan	O
on	O
August	O
9	O
.	O
</s>
<s>
The	O
1996	O
Windows	O
version	O
was	O
ported	O
to	O
the	O
GameCube	B-Application
and	O
PlayStation	B-Device
2	I-Device
in	O
August	O
2005	O
for	O
Sonic	B-Application
Gems	I-Application
Collection	I-Application
.	O
</s>
<s>
In	O
2009	O
,	O
independent	O
programmer	O
Christian	O
Whitehead	O
produced	O
a	O
proof-of-concept	O
video	O
of	O
a	O
remastered	O
version	O
of	O
the	O
game	O
,	O
using	O
his	O
Retro	B-Application
Engine	I-Application
,	O
running	O
on	O
iOS	B-Application
.	O
</s>
<s>
Sega	O
released	O
this	O
version	O
in	O
2011	O
for	O
Xbox	B-Operating_System
360	I-Operating_System
,	O
PlayStation	B-Operating_System
3	I-Operating_System
,	O
iOS	B-Application
,	O
Android	B-Application
,	O
and	O
PC	O
,	O
with	O
assistance	O
from	O
BlitWorks	O
in	O
the	O
PC	O
and	O
console	O
ports	O
.	O
</s>
<s>
The	O
remaster	O
features	O
enhancements	O
such	O
as	O
widescreen	O
graphics	O
,	O
fine-tuned	O
collision	O
detection	O
to	O
make	O
time	O
traveling	O
more	O
consistent	O
,	O
refined	O
visuals	O
and	O
frame	O
rate	O
for	O
Special	O
Stages	O
,	O
the	O
option	O
for	O
spin	O
dash	O
physics	O
from	O
Sonic	B-Application
the	I-Application
Hedgehog	I-Application
2	I-Application
,	O
both	O
the	O
Japanese	O
and	O
North	O
American	O
soundtracks	O
,	O
the	O
ability	O
to	O
unlock	O
Tails	O
as	O
a	O
playable	O
character	O
,	O
and	O
achievement	O
and	O
trophy	O
support	O
.	O
</s>
<s>
The	O
remaster	O
was	O
not	O
released	O
on	O
the	B-Operating_System
Wii	I-Operating_System
as	O
it	O
exceeded	O
the	O
WiiWare	O
download	O
size	O
.	O
</s>
<s>
It	O
was	O
included	O
in	O
the	O
2022	O
compilation	O
Sonic	B-Device
Origins	I-Device
,	O
which	O
removed	O
voice	O
lines	O
for	O
Sonic	B-Application
and	O
Amy	O
.	O
</s>
<s>
The	O
Sega	B-Device
CD	I-Device
version	O
sold	O
more	O
than	O
1.5	O
million	O
copies	O
,	O
making	O
it	O
the	O
system	O
's	O
best-seller	O
.	O
</s>
<s>
In	O
the	O
United	O
Kingdom	O
,	O
it	O
was	O
the	O
top-selling	O
Mega	B-Device
CD	I-Device
game	O
in	O
December	B-Application
1993	I-Application
.	O
</s>
<s>
Computer	O
and	O
Video	O
Games	O
wrote	O
that	O
,	O
although	O
Sonic	B-Application
CD	I-Application
did	O
not	O
use	O
the	O
Sega	B-Device
CD	I-Device
's	O
capabilities	O
to	O
its	O
fullest	O
,	O
the	O
game	O
's	O
graphics	O
and	O
sound	O
were	O
still	O
excellent	O
,	O
calling	O
the	O
music	O
"	O
from	O
the	O
likes	O
of	O
2Unlimited	O
and	O
Bizarre	O
Inc	O
"	O
.	O
</s>
<s>
Electronic	O
Games	O
said	O
that	O
the	O
game	O
looked	O
similar	O
to	O
older	O
games	O
and	O
used	O
the	O
Sega	B-Device
CD	I-Device
's	O
special	O
features	O
minimally	O
,	O
but	O
this	O
did	O
not	O
detract	O
from	O
the	O
quality	O
.	O
</s>
<s>
The	O
music	O
was	O
singled	O
out	O
as	O
making	O
Sonic	B-Application
CD	I-Application
"	O
stand	O
above	O
the	O
crowd	O
"	O
;	O
the	O
reviewer	O
wrote	O
that	O
it	O
helped	O
add	O
richness	O
to	O
the	O
game	O
.	O
</s>
<s>
GameFan	O
,	O
which	O
had	O
given	O
the	O
Japanese	O
version	O
of	O
Sonic	B-Application
CD	I-Application
a	O
score	O
of	O
100%	O
,	O
lambasted	O
the	O
change	O
.	O
</s>
<s>
The	O
reviewer	O
for	O
GamesRadar	O
said	O
he	O
shut	O
his	O
GameCube	B-Application
off	O
in	O
disgust	O
when	O
he	O
realized	O
Sonic	B-Application
Gems	I-Application
Collection	I-Application
used	O
the	O
American	O
soundtrack	O
.	O
</s>
<s>
In	O
a	O
2008	O
interview	O
,	O
Nilsen	O
said	O
"	O
I	O
think	O
critics	O
were	O
looking	O
for	O
a	O
way	O
to	O
bash	O
the	O
game	O
...	O
it	O
was	O
like	O
we	O
replaced	O
the	O
music	O
for	O
Star	B-Application
Wars	I-Application
after	O
the	O
movie	O
had	O
been	O
out	O
for	O
a	O
while.	O
"	O
</s>
<s>
Electronic	O
Games	O
wrote	O
that	O
Sonic	B-Application
CD	I-Application
played	O
as	O
well	O
as	O
previous	O
Sonic	B-Application
games	O
,	O
and	O
that	O
the	O
time	O
travel	O
—	O
coupled	O
with	O
large	O
levels	O
rich	O
with	O
secrets	O
and	O
Super	O
Mario	O
Kart-like	O
special	O
stages	O
—	O
added	O
replayability	O
.	O
</s>
<s>
Sega	O
Pro	O
also	O
noted	O
the	O
expanded	O
environments	O
and	O
the	O
replay	O
value	O
travel	O
added	O
by	O
the	O
time	O
travel	O
,	O
writing	O
that	O
"	O
the	O
more	O
you	O
play	O
Sonic	B-Application
CD	I-Application
the	O
better	O
it	O
gets	O
"	O
,	O
but	O
felt	O
the	O
game	O
was	O
too	O
easy	O
.	O
</s>
<s>
In	O
its	O
debut	O
issue	O
,	O
Sega	O
Magazine	O
said	O
Sonic	B-Application
CD	I-Application
was	O
"	O
potentially	O
a	O
classic	O
"	O
.	O
</s>
<s>
GameSpot	O
singled	O
out	O
the	O
"	O
interesting	O
level	O
design	O
and	O
the	O
time-travelling	O
gameplay	O
"	O
as	O
a	O
major	O
selling	O
point	O
,	O
saying	O
it	O
provided	O
a	O
unique	O
take	O
on	O
the	O
classic	O
Sonic	B-Application
formula	O
.	O
</s>
<s>
Critics	O
wrote	O
that	O
Sonic	B-Application
CD	I-Application
was	O
one	O
of	O
the	O
best	O
Sega	B-Device
CD	I-Device
games	O
.	O
</s>
<s>
Destructoid	O
described	O
it	O
as	O
"	O
a	O
hallmark	O
of	O
excellence	O
"	O
,	O
creative	O
,	O
strange	O
,	O
and	O
exciting	O
,	O
and	O
said	O
that	O
"	O
to	O
miss	O
Sonic	B-Application
CD	I-Application
would	O
be	O
to	O
miss	O
some	O
of	O
the	O
franchise	O
's	O
best	O
"	O
.	O
</s>
<s>
Reception	O
to	O
later	O
versions	O
of	O
Sonic	B-Application
CD	I-Application
varied	O
.	O
</s>
<s>
The	O
reviewer	O
wrote	O
that	O
"	O
those	O
who	O
have	O
played	O
Sonic	B-Application
on	O
a	O
Sega	O
game	O
system	O
will	O
find	O
nothing	O
new	O
here	O
"	O
and	O
that	O
it	O
was	O
not	O
worth	O
its	O
$50	O
price	O
.	O
</s>
<s>
Reviews	O
of	O
the	O
version	O
in	O
Sonic	B-Application
Gems	I-Application
Collection	I-Application
were	O
favorable	O
.	O
</s>
<s>
IGN	O
remembered	O
Sonic	B-Application
CD	I-Application
as	O
one	O
of	O
the	O
best	O
things	O
about	O
the	O
Sega	B-Device
CD	I-Device
and	O
called	O
it	O
a	O
standout	O
for	O
the	O
compilation	O
,	O
and	O
a	O
major	O
selling	O
point	O
.	O
</s>
<s>
Eurogamer	O
wrote	O
:	O
"	O
Rejoice	O
for	O
Sonic	B-Application
CD	I-Application
...	O
Just	O
do	O
n't	O
rejoice	O
for	O
anything	O
else	O
[	O
in	O
Sonic	O
Gems	O
Collection ]	O
,	O
because	O
it	O
's	O
mostly	O
rubbish.	O
"	O
</s>
<s>
According	O
to	O
Metacritic	O
,	O
the	O
2011	O
console	O
version	O
received	O
"	O
generally	O
favorable	O
reviews	O
"	O
,	O
while	O
the	O
iOS	B-Application
version	O
received	O
"	O
universal	O
acclaim	O
"	O
.	O
</s>
<s>
Sonic	B-Application
CD	I-Application
is	O
frequently	O
named	O
among	O
the	O
best	O
Sonic	B-Application
games	O
and	O
platform	O
games	O
.	O
</s>
<s>
The	O
story	O
of	O
Sonic	B-Application
CD	I-Application
was	O
adapted	O
in	O
the	O
twenty-fifth	O
issue	O
of	O
Archie	O
Comics	O
 '	O
Sonic	B-Application
the	I-Application
Hedgehog	I-Application
comic	O
book	O
series	O
.	O
</s>
<s>
The	O
adaptation	O
featured	O
some	O
changes	O
to	O
the	O
story	O
,	O
such	O
as	O
Tails	O
being	O
an	O
important	O
character	O
and	O
Metal	O
Sonic	B-Application
having	O
the	O
ability	O
to	O
talk	O
.	O
</s>
<s>
British	O
publisher	O
Fleetway	O
Publications	O
published	O
their	O
own	O
adaptation	O
in	O
Sonic	B-Application
the	O
Comic	O
.	O
</s>
<s>
Two	O
characters	O
introduced	O
in	O
the	O
game	O
,	O
Amy	O
Rose	O
and	O
Metal	O
Sonic	B-Application
,	O
became	O
recurring	O
characters	O
in	O
the	O
Sonic	B-Application
series	I-Application
.	O
</s>
<s>
Metal	O
Sonic	B-Application
appeared	O
as	O
a	O
major	O
antagonist	O
in	O
Knuckles	B-Application
 '	I-Application
Chaotix	I-Application
(	O
1995	O
)	O
,	O
the	O
Sonic	B-Application
the	I-Application
Hedgehog	I-Application
Anime	O
movie	O
(	O
1996	O
)	O
,	O
Sonic	B-Application
Heroes	I-Application
(	O
2003	O
)	O
,	O
Sonic	B-Application
the	I-Application
Hedgehog	I-Application
4	I-Application
:	I-Application
Episode	I-Application
II	I-Application
(	O
2012	O
)	O
and	O
Sonic	B-Application
Mania	I-Application
(	O
2017	O
)	O
.	O
</s>
<s>
Amy	O
Rose	O
most	O
notably	O
appears	O
in	O
Sonic	B-Application
Adventure	I-Application
.	O
</s>
<s>
The	O
Sonic	B-Application
CD	I-Application
animated	O
sequences	O
were	O
included	O
as	O
bonuses	O
in	O
the	O
compilation	O
Sonic	B-Application
Jam	I-Application
(	O
1997	O
)	O
,	O
and	O
"	O
Sonic	B-Application
Boom	O
"	O
was	O
used	O
as	O
one	O
of	O
Sonic	B-Application
's	O
themes	O
in	O
Super	B-Application
Smash	I-Application
Bros	I-Application
.	I-Application
Brawl	I-Application
(	O
2008	O
)	O
.	O
</s>
<s>
In	O
2011	O
,	O
for	O
the	O
Sonic	B-Application
franchise	I-Application
's	O
20th	O
anniversary	O
,	O
Sega	O
released	O
Sonic	B-Application
Generations	I-Application
,	O
which	O
includes	O
remakes	O
of	O
various	O
Sonic	B-Application
stages	O
.	O
</s>
<s>
Both	O
versions	O
feature	O
a	O
re-imagined	O
version	O
of	O
the	O
boss	O
battle	O
against	O
Metal	O
Sonic	B-Application
.	O
</s>
<s>
Sonic	B-Application
Mania	I-Application
,	O
produced	O
for	O
the	O
series	O
 '	O
twenty-fifth	O
anniversary	O
,	O
features	O
updated	O
versions	O
of	O
Sonic	B-Application
CDs	I-Application
Metallic	O
Madness	O
and	O
Stardust	O
Speedway	O
levels	O
,	O
including	O
a	O
boss	O
battle	O
against	O
Metal	O
Sonic	B-Application
.	O
</s>
