<s>
(	O
stylized	O
as	O
SPACƎ	O
INVADERS	O
EXTRƎME	O
)	O
is	O
a	O
re-vamped	O
incarnation	O
of	O
the	O
classic	O
arcade	O
game	O
Space	B-Application
Invaders	I-Application
.	O
</s>
<s>
The	O
DS	B-Device
and	O
PSP	B-Operating_System
versions	O
were	O
released	O
to	O
mark	O
the	O
30th	O
anniversary	O
of	O
Space	B-Application
Invaders	I-Application
which	O
saw	O
its	O
original	O
arcade	O
release	O
in	O
1978	B-Application
.	O
</s>
<s>
An	O
HD	O
version	O
of	O
the	O
game	O
has	O
been	O
remastered	O
by	O
Backbone	O
Entertainment	O
for	O
Xbox	B-Device
Live	I-Device
Arcade	I-Device
with	O
new	O
four-player	O
multiplayer	O
modes	O
and	O
visualizer	O
backgrounds	O
by	O
Jeff	O
Minter	O
,	O
it	O
was	O
released	O
on	O
May	O
6	O
,	O
2009	O
as	O
a	O
wrap-up	O
to	O
the	O
30th	O
anniversary	O
.	O
</s>
<s>
A	O
sequel	O
for	O
the	O
DS	B-Device
titled	O
Space	B-Device
Invaders	I-Device
Extreme	I-Device
2	I-Device
was	O
released	O
in	O
Japan	O
on	O
26	O
March	O
2009	O
,	O
North	O
America	O
on	O
20	O
October	O
2009	O
,	O
and	O
Europe	O
on	O
2	O
October	O
2009	O
.	O
</s>
<s>
Space	B-Device
Invaders	I-Device
Extreme	I-Device
was	O
released	O
for	O
Steam	B-Application
in	O
North	O
America	O
on	O
13	O
February	O
2018	O
,	O
to	O
mark	O
the	O
40th	O
anniversary	O
of	O
Space	B-Application
Invaders	I-Application
.	O
</s>
<s>
It	O
would	O
later	O
be	O
released	O
on	O
PlayStation	B-Operating_System
4	I-Operating_System
and	O
Nintendo	B-Application
Switch	I-Application
as	O
part	O
of	O
Space	B-Application
Invaders	I-Application
Invincible	I-Application
Collection	I-Application
and	O
Space	B-Application
Invaders	I-Application
Forever	I-Application
.	O
</s>
<s>
The	O
player	O
controls	O
a	O
cannon	O
at	O
the	O
bottom	O
of	O
the	O
display	O
(	O
Yellow	O
on	O
DS	B-Device
and	O
PC	B-Device
,	O
Silver	O
on	O
PSP	B-Operating_System
and	O
Purple	O
on	O
Xbox	B-Operating_System
360	I-Operating_System
)	O
-	O
this	O
can	O
move	O
left	O
or	O
right	O
and	O
fire	O
.	O
</s>
<s>
This	O
is	O
the	O
same	O
basic	O
design	O
as	O
Space	B-Application
Invaders	I-Application
;	O
the	O
player	O
loses	O
a	O
life	O
if	O
hit	O
,	O
or	O
if	O
one	O
of	O
the	O
aliens	O
touches	O
the	O
ground	O
(	O
Nagoya	O
Attack	O
)	O
;	O
but	O
the	O
formation	O
of	O
the	O
aliens	O
differs	O
greatly	O
,	O
changing	O
from	O
level	O
to	O
level	O
.	O
</s>
<s>
Stage	O
Mode	O
(	O
Free	O
Play	O
on	O
PC	B-Device
)	O
allows	O
the	O
player	O
to	O
replay	O
any	O
stage	O
they	O
have	O
completed	O
.	O
</s>
<s>
The	O
Xbox	B-Device
Live	I-Device
Arcade	I-Device
version	O
of	O
the	O
game	O
is	O
the	O
first	O
version	O
to	O
include	O
four-player	O
co-op	O
and	O
versus	O
multiplayer	O
modes	O
.	O
</s>
<s>
Players	O
can	O
compete	O
both	O
locally	O
and	O
online	O
over	O
Xbox	B-Operating_System
Live	O
.	O
</s>
<s>
On	O
the	O
DS	B-Device
,	O
two	O
players	O
can	O
compete	O
against	O
each	O
other	O
using	O
either	O
the	O
Single-card	O
download	O
play	O
,	O
Multi-card	O
play	O
,	O
or	O
Nintendo	B-Application
WiFi	I-Application
Connection	I-Application
(	O
via	O
the	O
Internet	O
)	O
.	O
</s>
<s>
The	O
PSP	B-Operating_System
version	O
only	O
allows	O
local	O
competitive	O
play	O
.	O
</s>
<s>
Multiple	O
player	O
options	O
for	O
the	O
DS	B-Device
version	O
have	O
already	O
been	O
mentioned	O
above	O
,	O
but	O
in	O
gameplay	O
terms	O
both	O
versions	O
are	O
the	O
same	O
,	O
sharing	O
the	O
same	O
levels	O
,	O
attack	O
formations	O
,	O
similar	O
graphics	O
,	O
and	O
power-ups	O
.	O
</s>
<s>
However	O
,	O
the	O
PSP	B-Operating_System
version	O
has	O
crisper	O
graphics	O
due	O
to	O
the	O
higher	O
resolution	O
implemented	O
on	O
the	O
PSP	B-Operating_System
.	O
</s>
<s>
Also	O
,	O
while	O
the	O
DS	B-Device
version	O
has	O
a	O
soundtrack	O
composed	O
and	O
performed	O
entirely	O
by	O
Taito	O
's	O
in-house	O
sound	O
team	O
Zuntata	O
,	O
the	O
PSP	B-Operating_System
version	O
features	O
music	O
from	O
a	O
guest	O
group	O
of	O
external	O
composers	O
and	O
DJs	O
.	O
</s>
<s>
The	O
obvious	O
main	O
difference	O
between	O
the	O
two	O
is	O
the	O
use	O
of	O
the	O
second	O
screen	O
on	O
the	O
DS	B-Device
version	O
.	O
</s>
<s>
The	O
Nintendo	B-Device
DS	I-Device
version	O
can	O
also	O
use	O
the	O
Nintendo	B-Device
DS	I-Device
Paddle	O
Controller	O
which	O
was	O
originally	O
designed	O
for	O
Arkanoid	O
on	O
the	O
DS	B-Device
,	O
or	O
the	O
DS	B-Device
Rumble	O
Pack	O
,	O
adding	O
force	O
feedback	O
to	O
the	O
game	O
's	O
music	O
.	O
</s>
<s>
In	O
addition	O
to	O
the	O
peripheral	O
support	O
,	O
the	O
DS	B-Device
version	O
features	O
many	O
modes	O
of	O
online	O
play	O
not	O
available	O
to	O
its	O
PSP	B-Operating_System
counterpart	O
;	O
the	O
game	O
can	O
be	O
played	O
against	O
random	O
players	O
and	O
friends	O
over	O
the	O
Nintendo	B-Application
WiFi	I-Application
Connection	I-Application
,	O
and	O
top	O
scores	O
can	O
also	O
be	O
shared	O
over	O
the	O
internet	O
.	O
</s>
<s>
The	O
PSP	B-Operating_System
version	O
only	O
supports	O
multiplayer	O
locally	O
in	O
Ad-Hoc	O
mode	O
,	O
and	O
each	O
player	O
must	O
have	O
their	O
own	O
game	O
disc	O
.	O
</s>
<s>
The	O
Xbox	B-Device
Live	I-Device
Arcade	I-Device
version	O
has	O
many	O
of	O
the	O
networking	O
features	O
of	O
the	O
DS	B-Device
version	O
with	O
the	O
addition	O
of	O
a	O
co-op	O
mode	O
where	O
up	O
to	O
four	O
players	O
can	O
play	O
the	O
arcade	O
mode	O
.	O
</s>
<s>
The	O
Steam	B-Application
version	O
has	O
higher	O
quality	O
sound	O
effects	O
and	O
music	O
that	O
were	O
used	O
on	O
the	O
DS	B-Device
version	O
of	O
the	O
game	O
.	O
</s>
<s>
Downloadable	O
content	O
was	O
announced	O
for	O
the	O
Xbox	B-Device
Live	I-Device
Arcade	I-Device
version	O
of	O
Space	B-Device
Invaders	I-Device
Extreme	I-Device
on	O
17	O
June	O
,	O
due	O
on	O
the	O
18th	O
of	O
the	O
same	O
month	O
.	O
</s>
<s>
It	O
includes	O
three	O
new	O
stages	O
,	O
with	O
new	O
enemies	O
and	O
bosses	O
,	O
and	O
two	O
emulators	O
,	O
allowing	O
the	O
play	O
of	O
the	O
original	O
arcade	O
versions	O
of	O
Space	B-Application
Invaders	I-Application
and	O
Space	B-Application
Invaders	I-Application
Part	O
II	O
.	O
</s>
<s>
The	O
game	O
is	O
noted	O
for	O
its	O
fast-paced	O
gameplay	O
with	O
IGN	O
claiming	O
the	O
game	O
"[is]	O
energetic	O
and	O
addictive	O
,	O
and	O
does	O
an	O
absolutely	O
fantastic	O
job	O
retaining	O
the	O
old-school	O
charm	O
of	O
the	O
original	O
1978	B-Application
classic	O
"	O
;	O
however	O
,	O
IGN	O
scored	O
the	O
PSP	B-Operating_System
version	O
of	O
the	O
game	O
slightly	O
lower	O
due	O
to	O
its	O
lack	O
of	O
online	O
play	O
and	O
score	O
sharing	O
.	O
</s>
<s>
1UP.com	O
called	O
the	O
single-player	O
mode	O
"	O
engrossing	O
"	O
and	O
GameSpot	O
later	O
concludes	O
that	O
"	O
Space	B-Device
Invaders	I-Device
Extreme	I-Device
is	O
a	O
very	O
good	O
example	O
of	O
how	O
to	O
update	O
a	O
classic	O
game	O
"	O
.	O
</s>
<s>
Both	O
versions	O
of	O
Space	B-Device
Invaders	I-Device
Extreme	I-Device
were	O
listed	O
as	O
the	O
best	O
shooter	O
game	O
for	O
their	O
respective	O
consoles	O
by	O
IGN	O
.	O
</s>
<s>
IGN	O
also	O
awarded	O
the	O
DS	B-Device
version	O
as	O
having	O
the	O
best	O
artistic	O
design	O
and	O
best	O
original	O
score	O
,	O
as	O
well	O
as	O
being	O
best	O
shooter	O
for	O
the	O
DS	B-Device
.	O
</s>
<s>
Space	B-Device
Invaders	I-Device
Extreme	I-Device
2	I-Device
was	O
released	O
in	O
Japan	O
on	O
26	O
March	O
2009	O
,	O
2	O
October	O
2009	O
in	O
Europe	O
and	O
on	O
20	O
October	O
2009	O
in	O
North	O
America	O
.	O
</s>
<s>
Also	O
,	O
in	O
Japan	O
,	O
a	O
mini	O
version	O
was	O
released	O
to	O
DSiWare	B-Device
called	O
Space	B-Device
Invaders	I-Device
Extreme	I-Device
Z	O
,	O
which	O
has	O
no	O
multiplayer	O
or	O
online	O
WiFi	O
rankings	O
.	O
</s>
