<s>
is	O
a	O
2005	O
fighting	O
video	O
game	O
developed	O
by	O
Team	O
Ninja	B-Application
and	O
published	O
by	O
Tecmo	O
for	O
the	B-Operating_System
Xbox	I-Operating_System
360	I-Operating_System
.	O
</s>
<s>
It	O
is	O
the	O
fourth	O
main	O
entry	O
in	O
the	O
Dead	B-Application
or	I-Application
Alive	I-Application
fighting	O
series	O
.	O
</s>
<s>
The	O
story	O
of	O
the	O
game	O
focuses	O
on	O
the	O
continuing	O
war	O
between	O
the	O
Mugen	O
Tenshin	O
Ninja	B-Application
Clan	O
and	O
DOATEC	B-Application
,	O
and	O
Helena	O
Douglas	O
taking	O
over	O
the	O
mantle	O
of	O
DOATEC	B-Application
as	O
its	O
new	O
president	O
,	O
determined	O
to	O
fight	O
against	O
the	O
corruption	O
within	O
the	O
enormous	O
organization	O
.	O
</s>
<s>
DOA4	B-Application
was	O
generally	O
well	O
received	O
,	O
with	O
an	O
average	O
score	O
of	O
85/100	O
on	O
Metacritic	O
.	O
</s>
<s>
The	O
game	O
was	O
later	O
followed	O
by	O
Dead	B-Application
or	I-Application
Alive	I-Application
:	I-Application
Dimensions	I-Application
in	O
2011	O
.	O
</s>
<s>
On	O
November	O
15	O
,	O
2021	O
,	O
DOA4	B-Application
was	O
made	O
available	O
on	O
Xbox	B-Device
One	I-Device
and	O
Xbox	B-Device
Series	I-Device
X/S	I-Device
through	O
backward	B-Device
compatibility	I-Device
.	O
</s>
<s>
Dead	B-Application
or	I-Application
Alive	I-Application
4	I-Application
has	O
a	O
number	O
of	O
updates	O
in	O
reference	O
to	O
previous	O
titles	O
.	O
</s>
<s>
New	O
to	O
DOA4	B-Application
is	O
the	O
introduction	O
of	O
the	O
"	O
Bounce	O
Combo	O
"	O
system	O
.	O
</s>
<s>
New	O
to	O
the	O
game	O
's	O
Online	O
Mode	O
is	O
the	O
introduction	O
of	O
Avatars	B-Application
and	O
Lobby	O
Environments	O
,	O
making	O
it	O
the	O
first	O
fighting	O
game	O
to	O
include	O
these	O
features	O
.	O
</s>
<s>
Players	O
can	O
customize	O
their	O
Avatars	B-Application
and	O
the	O
environment	O
and	O
furniture	O
in	O
their	O
Lobby	O
.	O
</s>
<s>
Award	O
points	O
are	O
earned	O
from	O
winning	O
online	O
battles	O
and	O
players	O
can	O
use	O
the	O
points	O
to	O
buy	O
accessories	O
for	O
their	O
Avatars	B-Application
and	O
Lobby	O
rooms	O
.	O
</s>
<s>
However	O
,	O
like	O
Dead	B-Application
or	I-Application
Alive	I-Application
3	I-Application
,	O
the	O
game	O
features	O
a	O
relatively	O
low	O
number	O
of	O
costumes	O
and	O
several	O
characters	O
now	O
had	O
to	O
be	O
unlocked	O
by	O
the	O
player	O
including	O
Helena	O
.	O
</s>
<s>
Dead	B-Application
or	I-Application
Alive	I-Application
4	I-Application
features	O
22	O
playable	O
characters	O
,	O
and	O
multi-tiered	O
and	O
interactive	O
fighting	O
arenas	O
.	O
</s>
<s>
DOA	O
Online	O
,	O
available	O
via	O
the	O
Xbox	B-Application
Live	I-Application
and	O
similar	O
to	O
the	O
Versus	O
mode	O
,	O
where	O
players	O
could	O
interact	O
in	O
a	O
similar	O
fashion	O
to	O
an	O
arcade	O
setting	O
fighting	O
opponents	O
at	O
win/loss	O
intervals	O
.	O
</s>
<s>
Dead	B-Application
or	I-Application
Alive	I-Application
4	I-Application
features	O
a	O
total	O
of	O
23	O
fighters	O
,	O
including	O
22	O
playable	O
characters	O
and	O
the	O
boss	O
character	O
Alpha-152	B-Application
.	O
</s>
<s>
DOA4	B-Application
features	O
three	O
new	O
playable	O
characters	O
:	O
Kokoro	O
,	O
a	O
young	O
geisha	B-Application
in	O
training	O
;	O
Eliot	O
,	O
a	O
16-year-old	O
boy	O
from	O
England	O
and	O
protégé	O
to	O
Gen	O
Fu	O
;	O
and	O
La	O
Mariposa	O
,	O
a	O
female	O
Lucha	O
Libre	O
wrestler	O
.	O
</s>
<s>
In	O
addition	O
,	O
DOA4	B-Application
features	O
a	O
playable	O
unlockable	O
character	O
from	O
the	O
Halo	O
series	O
,	O
a	O
female	O
Spartan	O
supersoldier	O
going	O
by	O
the	O
name	O
"	O
Spartan-458	O
"	O
(	O
with	O
a	O
Halo-themed	O
stage	O
Nassau	O
Station	O
in	O
the	O
game	O
)	O
;	O
it	O
would	O
later	O
be	O
revealed	O
that	O
her	O
real	O
name	O
would	O
be	O
"	O
Nicole	O
"	O
.	O
</s>
<s>
Alpha-152	B-Application
(	O
unplayable	O
)	O
,	O
the	O
final	O
stage	O
of	O
DOATEC	B-Application
's	O
human	O
weapon	O
series	O
Project	O
Alpha	O
,	O
created	O
from	O
Kasumi	O
's	O
DNA	O
by	O
the	O
evil	O
scientist	O
,	O
Victor	O
Donovan	O
.	O
</s>
<s>
Kokoro	O
,	O
a	O
young	O
Japanese	O
girl	O
currently	O
training	O
to	O
become	O
a	O
geisha	B-Application
.	O
</s>
<s>
She	O
is	O
the	O
result	O
of	O
the	O
collaboration	O
between	O
Tecmo	O
's	O
Team	O
Ninja	B-Application
and	O
Microsoft	O
's	O
Bungie	O
.	O
</s>
<s>
Alpha-152	B-Application
is	O
an	O
unplayable	O
boss	O
character	O
that	O
cannot	O
be	O
used	O
in	O
any	O
mode	O
.	O
</s>
<s>
Helena	O
Douglas	O
,	O
daughter	O
of	O
the	O
founder	O
and	O
former	O
chairman	O
of	O
the	O
Dead	B-Application
or	I-Application
Alive	I-Application
Tournament	O
Executive	O
Committee	O
,	O
Fame	O
Douglas	O
,	O
takes	O
over	O
the	O
mantle	O
of	O
DOATEC	B-Application
as	O
its	O
second	O
chairman	O
,	O
determined	O
to	O
fight	O
against	O
the	O
corruption	O
within	O
the	O
organization	O
.	O
</s>
<s>
The	O
man	O
who	O
holds	O
the	O
true	O
power	O
at	O
DOATEC	B-Application
,	O
Victor	O
Donovan	O
,	O
locked	O
himself	O
in	O
the	O
Bio	O
Lab	O
Core	O
again	O
to	O
continue	O
coveting	O
his	O
dream	O
of	O
creating	O
the	O
perfect	O
human	O
weapon	O
.	O
</s>
<s>
His	O
new	O
project	O
,	O
code	O
named	O
"	O
Alpha-152	B-Application
"	O
,	O
is	O
the	O
result	O
of	O
the	O
ultimate	O
evolution	O
of	O
hyper-cloning	O
technology	O
,	O
birthed	O
from	O
a	O
DNA	O
sample	O
of	O
Kasumi	O
.	O
</s>
<s>
The	O
war	O
between	O
the	O
Mugen	O
Tenshin	O
Ninja	B-Application
Clan	O
and	O
DOATEC	B-Application
continues	O
.	O
</s>
<s>
During	O
the	O
last	B-Application
tournament	I-Application
,	O
after	O
Ayane	O
successfully	O
defeats	O
DOATEC	B-Application
's	O
last	O
creation	O
,	O
Omega	O
,	O
Hayate	O
returned	O
to	O
the	O
Mugen	O
Tenshin	O
clan	O
,	O
taking	O
over	O
the	O
leadership	O
.	O
</s>
<s>
Now	O
leader	O
,	O
his	O
heart	O
burns	O
with	O
the	O
desire	O
of	O
revenge	O
as	O
he	O
goes	O
on	O
a	O
quest	O
to	O
put	O
an	O
end	O
to	O
DOATEC	B-Application
for	O
the	O
innumerable	O
pain	O
the	O
Mugen	O
Tenshin	O
Ninjas	B-Application
have	O
suffered	O
from	O
the	O
organization	O
.	O
</s>
<s>
During	O
the	O
fourth	O
tournament	O
,	O
Hayate	O
brought	O
together	O
the	O
most	O
powerful	O
group	O
of	O
ninjas	B-Application
known	O
to	O
man	O
.	O
</s>
<s>
The	O
forces	O
of	O
Mugen	O
Tenshin	O
launches	O
an	O
assault	O
on	O
DOATEC	B-Application
's	O
primary	O
headquarters	O
,	O
the	O
gigantic	O
999	O
meter	O
Tri-tower	O
building	O
.	O
</s>
<s>
Hayate	O
is	O
approached	O
by	O
a	O
luchadora	O
named	O
La	O
Mariposa	O
who	O
reveals	O
to	O
him	O
about	O
her	O
manipulation	O
of	O
him	O
in	O
coming	O
to	O
destroy	O
DOATEC	B-Application
.	O
</s>
<s>
Bayman	O
tells	O
Hayate	O
not	O
to	O
interfere	O
in	O
his	O
revenge	O
but	O
Hayate	O
states	O
that	O
he	O
ca	O
n't	O
let	O
him	O
fool	O
things	O
up	O
while	O
the	O
ninjas	B-Application
proceed	O
with	O
their	O
assault	O
.	O
</s>
<s>
La	O
Mariposa	O
comes	O
across	O
Helena	O
and	O
reveals	O
to	O
her	O
about	O
her	O
involvement	O
in	O
DOATEC	B-Application
's	O
Epsilon	O
project	O
before	O
the	O
second	B-Application
tournament	I-Application
and	O
her	O
reason	O
for	O
Hayate	O
coming	O
to	O
DOATEC	B-Application
.	O
</s>
<s>
Helena	O
reveals	O
to	O
her	O
that	O
stopping	O
Alpha-152	B-Application
from	O
awakening	O
is	O
now	O
impossible	O
due	O
to	O
her	O
shutdown	O
mechanism	O
being	O
destroyed	O
,	O
and	O
only	O
one	O
option	O
is	O
left	O
to	O
stop	O
Alpha	O
.	O
</s>
<s>
Kasumi	O
later	O
confronts	O
Helena	O
,	O
telling	O
her	O
to	O
stop	O
the	O
war	O
between	O
DOATEC	B-Application
and	O
the	O
Mugen	O
Tenshin	O
.	O
</s>
<s>
Helena	O
refuses	O
,	O
stating	O
that	O
Hayate	O
and	O
the	O
others	O
will	O
stop	O
at	O
nothing	O
until	O
DOATEC	B-Application
is	O
destroyed	O
,	O
and	O
she	O
is	O
willing	O
do	O
anything	O
to	O
stop	O
Donovan	O
and	O
Alpha-152	B-Application
from	O
causing	O
havoc	O
in	O
the	O
world	O
.	O
</s>
<s>
The	O
ninjas	B-Application
 '	O
assault	O
left	O
the	O
Tri-tower	O
building	O
in	O
an	O
inferno	O
,	O
and	O
the	O
buildings	O
 '	O
auto-destruct	O
sequence	O
activated	O
by	O
Helena	O
lead	O
to	O
the	O
buildings	O
 '	O
ultimate	O
destruction	O
.	O
</s>
<s>
Strolling	O
through	O
the	O
burning	O
buildings	O
,	O
Helena	O
reflects	O
on	O
the	O
certain	O
events	O
of	O
her	O
life	O
while	O
the	O
ninjas	B-Application
continue	O
their	O
assault	O
and	O
Kasumi	O
fights	O
Alpha-152	B-Application
.	O
</s>
<s>
The	O
first	O
official	O
screenshots	O
,	O
in-game	O
demos	O
and	O
cinematics	O
were	O
presented	O
by	O
Microsoft	O
at	O
press	O
conferences	O
,	O
with	O
the	O
game	O
originally	O
slated	O
to	O
be	O
a	O
launch	O
title	O
for	O
the	B-Operating_System
Xbox	I-Operating_System
360	I-Operating_System
.	O
</s>
<s>
In	O
an	O
interview	O
with	O
Famitsu	O
Xbox	B-Device
,	O
Tomonobu	O
Itagaki	O
remarked	O
that	O
he	O
spent	O
99%	O
of	O
his	O
time	O
developing	O
the	O
game	O
,	O
while	O
only	O
sleeping	O
40	O
minutes	O
in	O
four	O
days	O
.	O
</s>
<s>
Technical	O
assistance	O
for	O
Dead	B-Application
or	I-Application
Alive	I-Application
4	I-Application
was	O
given	O
by	O
Blindlight	O
.	O
</s>
<s>
The	O
game	O
was	O
delayed	O
many	O
times	O
before	O
eventually	O
being	O
released	O
on	O
December	O
29	O
,	O
2005	O
,	O
more	O
than	O
a	O
month	O
after	O
the	B-Operating_System
Xbox	I-Operating_System
360	I-Operating_System
debuted	O
,	O
having	O
been	O
initially	O
held	O
back	O
by	O
retailers	O
.	O
</s>
<s>
Famitsu	O
Xbox	B-Device
editor-in-chief	O
Munetatsu	O
Matsui	O
pointed	O
to	O
Dead	O
or	O
Alive	O
4'''s	O
absence	O
as	O
a	O
launch	O
title	O
as	O
the	O
main	O
factor	O
behind	O
the	O
slow	O
sales	O
of	O
the	B-Operating_System
Xbox	I-Operating_System
360	I-Operating_System
in	O
Japan	O
.	O
</s>
<s>
It	O
is	O
the	O
first	O
main	O
fighting	O
game	O
in	O
the	O
series	O
(	O
and	O
third	O
overall	O
,	O
following	O
Dead	B-Application
or	I-Application
Alive	I-Application
Ultimate	I-Application
)	O
to	O
receive	O
a	O
Mature	O
rating	O
by	O
the	O
ESRB	O
.	O
</s>
<s>
Since	O
Dead	B-Application
or	I-Application
Alive	I-Application
4	I-Application
's	O
release	O
,	O
a	O
demo	O
version	O
of	O
the	O
game	O
has	O
been	O
available	O
for	O
free	O
download	O
via	O
Xbox	B-Application
Live	I-Application
on	O
July	O
24	O
,	O
2006	O
.	O
</s>
<s>
Two	O
songs	O
by	O
the	O
American	O
rock	O
band	O
Aerosmith	O
also	O
appear	O
in	O
Dead	B-Application
or	I-Application
Alive	I-Application
4	I-Application
.	O
</s>
<s>
An	O
Arcade	B-Application
Stick	I-Application
for	O
Dead	B-Application
or	I-Application
Alive	I-Application
4	I-Application
made	O
by	O
Japanese	O
video	O
game	O
peripheral	O
manufacturer	O
Hori	O
was	O
released	O
on	O
February	O
4	O
,	O
2006	O
,	O
exclusively	O
for	O
the	B-Operating_System
Xbox	I-Operating_System
360	I-Operating_System
.	O
</s>
<s>
The	O
Soundtrack	O
CD	O
Dead	B-Application
or	I-Application
Alive	I-Application
4	I-Application
Original	O
Sound	O
Trax	O
(	O
KWCD-1009	O
)	O
was	O
released	O
in	O
Japan	O
by	O
Wake	O
Up	O
in	O
2006	O
.	O
</s>
<s>
A	O
guide	O
book	O
titled	O
Dead	B-Application
or	I-Application
Alive	I-Application
4	I-Application
:	O
Official	O
Game	O
Guide	O
by	O
Prima	O
Games	O
was	O
published	O
in	O
North	O
America	O
on	O
January	O
24	O
,	O
2006	O
.	O
</s>
<s>
Three	O
guide	O
books	O
were	O
published	O
in	O
Japan	O
in	O
2005-2006	O
:	O
Dead	B-Application
or	I-Application
Alive	I-Application
4	I-Application
Official	O
Guide	O
Basic	O
File	O
(	O
by	O
Famitsu	O
Xbox	B-Device
/	O
Enterbrain	O
)	O
,	O
Dead	B-Application
or	I-Application
Alive	I-Application
4	I-Application
Best	O
Shot	O
(	O
by	O
SoftBank	O
)	O
,	O
and	O
Dead	B-Application
or	I-Application
Alive	I-Application
4	I-Application
Official	O
Guide	O
Master	O
File	O
(	O
by	O
Enterbrain	O
)	O
.	O
</s>
<s>
As	O
of	O
November	O
15	O
,	O
2021	O
,	O
Dead	B-Application
or	I-Application
Alive	I-Application
4	I-Application
is	O
now	O
backward	B-Device
compatible	I-Device
with	O
the	B-Device
Xbox	I-Device
One	I-Device
and	O
Xbox	B-Device
Series	I-Device
X/S	I-Device
.	O
</s>
<s>
Greg	O
Kasavin	O
of	O
GameSpot	O
wrote	O
:	O
"	O
It	O
's	O
simple	O
:	O
If	O
you	O
like	O
fighting	O
games	O
,	O
DOA4	B-Application
is	O
for	O
you	O
.	O
</s>
<s>
"	O
Dead	B-Application
or	I-Application
Alive	I-Application
4	I-Application
was	O
included	O
in	O
the	O
Evolution	O
Championship	O
Series	O
,	O
Championship	O
Gaming	O
Series	O
and	O
World	O
Cyber	O
Games	O
.	O
</s>
<s>
In	O
2008	O
,	O
GamePro	O
staff	O
ranked	O
it	O
as	O
the	O
11th	O
best	O
fighting	O
game	O
,	O
stating	O
:	O
"	O
The	O
first	O
new-generation	O
fighter	O
to	O
be	O
released	O
,	O
Dead	B-Application
or	I-Application
Alive	I-Application
4	I-Application
still	O
makes	O
a	O
strong	O
case	O
as	O
the	O
best	O
one	O
.	O
</s>
<s>
Furthermore	O
,	O
it	O
remains	O
one	O
of	O
the	O
best	O
Xbox	B-Operating_System
360	I-Operating_System
titles	O
still	O
fun	O
to	O
play	O
.	O
</s>
