<s>
is	O
a	O
beat	B-Application
'	I-Application
em	I-Application
up	I-Application
video	O
game	O
series	O
initially	O
developed	O
by	O
Technōs	O
Japan	O
and	O
released	O
as	O
an	O
arcade	O
game	O
in	O
1987	B-Application
.	O
</s>
<s>
The	O
series	O
features	O
twin	O
martial	O
artists	O
,	O
Billy	B-Application
and	I-Application
Jimmy	I-Application
Lee	I-Application
,	O
as	O
they	O
fight	O
against	O
various	O
adversaries	O
and	O
rivals	O
.	O
</s>
<s>
The	O
original	O
Double	B-Application
Dragon	I-Application
was	O
a	O
blockbuster	O
hit	O
arcade	O
game	O
,	O
ushering	O
in	O
a	O
"	O
Golden	O
Age	O
"	O
for	O
the	O
beat	B-Application
'	I-Application
em	I-Application
up	I-Application
genre	O
,	O
resulting	O
in	O
a	O
flood	O
of	O
beat	B-Application
'	I-Application
em	I-Application
ups	I-Application
during	O
the	O
late	O
1980s	O
to	O
1990s	O
that	O
followed	O
the	O
conventions	O
set	O
by	O
Double	B-Application
Dragon	I-Application
.	O
</s>
<s>
Due	O
to	O
the	O
popularity	O
of	O
the	O
game	O
series	O
,	O
a	O
1993	O
animated	O
series	O
and	O
1994	B-Application
live-action	O
film	O
adaptation	O
were	O
produced	O
;	O
these	O
adaptations	O
were	O
widely-panned	O
by	O
critics	O
and	O
audiences	O
.	O
</s>
<s>
The	O
franchise	O
is	O
now	O
the	O
property	O
of	O
Arc	O
System	O
Works	O
,	O
the	O
company	O
that	O
ported	O
the	O
original	O
Double	B-Application
Dragon	I-Application
to	O
the	O
Sega	O
Master	O
System	O
console	O
in	O
1988	B-Application
.	O
</s>
<s>
The	O
first	O
game	O
,	O
Double	B-Application
Dragon	I-Application
,	O
was	O
released	O
in	O
the	O
arcades	O
in	O
1987	B-Application
.	O
</s>
<s>
A	O
Nintendo	O
Entertainment	O
System	O
version	O
produced	O
by	O
Technōs	O
was	O
released	O
in	O
1988	B-Application
,	O
followed	O
by	O
a	O
Game	B-Device
Boy	I-Device
version	O
in	O
1990	B-Application
.	O
</s>
<s>
Various	O
licensed	O
versions	O
were	O
also	O
produced	O
by	O
other	O
developers	O
for	O
gaming	O
platforms	O
such	O
as	O
the	O
Master	O
System	O
,	O
Atari	B-General_Concept
2600	I-General_Concept
,	O
Atari	B-General_Concept
7800	I-General_Concept
,	O
Genesis	B-Operating_System
,	O
Atari	B-General_Concept
Lynx	I-General_Concept
and	O
for	O
home	O
computers	O
.	O
</s>
<s>
Two	O
Double	B-Application
Dragon	I-Application
sequels	O
were	O
released	O
for	O
the	O
arcade	O
:	O
Double	B-Application
Dragon	I-Application
II	I-Application
:	I-Application
The	I-Application
Revenge	I-Application
in	O
1988	B-Application
and	O
Double	B-Application
Dragon	I-Application
3	I-Application
:	I-Application
The	I-Application
Rosetta	I-Application
Stone	I-Application
in	O
1990	B-Application
.	O
</s>
<s>
Like	O
the	O
original	O
,	O
Technōs	O
produced	O
versions	O
for	O
the	O
NES	O
(	O
Double	B-Application
Dragon	I-Application
II	I-Application
:	I-Application
The	I-Application
Revenge	I-Application
in	O
1989	B-Application
and	O
Double	B-Application
Dragon	I-Application
III	I-Application
:	I-Application
The	I-Application
Sacred	I-Application
Stones	I-Application
in	O
1991	B-Application
,	O
respectively	O
)	O
.	O
</s>
<s>
In	O
1991	B-Application
,	O
a	O
game	O
titled	O
Double	B-Application
Dragon	I-Application
II	I-Application
,	O
unrelated	O
to	O
its	O
arcade	O
and	O
NES	O
counterpart	O
,	O
was	O
released	O
for	O
the	O
Game	B-Device
Boy	I-Device
.	O
</s>
<s>
A	O
fourth	O
game	O
in	O
the	O
main	O
series	O
was	O
released	O
exclusively	O
for	O
the	O
Super	B-Application
NES	I-Application
in	O
1992	O
,	O
titled	O
Super	B-Application
Double	I-Application
Dragon	I-Application
.	O
</s>
<s>
The	O
Game	O
Gear	O
game	O
Double	B-Application
Dragon	I-Application
is	I-Application
not	O
a	O
port	O
of	O
the	O
original	O
arcade	O
game	O
,	O
but	O
is	O
instead	O
an	O
entirely	O
new	O
entry	O
in	O
the	O
series	O
that	O
has	O
gameplay	O
elements	O
that	O
are	O
more	O
similar	O
to	O
Streets	B-Application
of	I-Application
Rage	I-Application
.	O
</s>
<s>
In	O
1994	B-Application
,	O
Tradewest	O
released	O
Double	B-Application
Dragon	I-Application
V	I-Application
:	I-Application
The	I-Application
Shadow	I-Application
Falls	I-Application
for	O
the	O
Super	B-Application
NES	I-Application
and	O
Genesis	B-Operating_System
in	O
North	O
America	O
and	O
Europe	O
,	O
a	O
fighting	O
game	O
developed	O
by	O
Leland	O
Interactive	O
based	O
on	O
the	O
Double	B-Application
Dragon	I-Application
animated	O
TV	O
series	O
by	O
Bohbot	O
Entertainment	O
.	O
</s>
<s>
A	O
Jaguar	B-Device
version	O
was	O
released	O
by	O
Telegames	O
as	O
well	O
.	O
</s>
<s>
Another	O
fighting	O
game	O
produced	O
by	O
Technōs	O
,	O
simply	O
titled	O
Double	B-Application
Dragon	I-Application
,	O
was	O
released	O
for	O
the	O
Neo	B-Application
Geo	I-Application
arcade	I-Application
and	O
home	O
console	O
in	O
1995	B-Application
.	O
</s>
<s>
A	O
Neo	B-Device
Geo	I-Device
CD	I-Device
version	O
was	O
also	O
released	O
,	O
as	O
well	O
as	O
a	O
PlayStation	B-Device
version	O
by	O
Urban	O
Plant	O
.	O
</s>
<s>
It	O
was	O
the	O
last	O
Double	B-Application
Dragon	I-Application
game	O
produced	O
by	O
Technōs	O
before	O
the	O
company	O
went	O
out	O
of	O
business	O
.	O
</s>
<s>
In	O
2003	B-Application
,	O
a	O
remake	O
of	O
the	O
original	O
Double	B-Application
Dragon	I-Application
,	O
titled	O
Double	B-Application
Dragon	I-Application
Advance	I-Application
,	O
was	O
produced	O
by	O
Atlus	O
and	O
Million	O
(	O
the	O
copyrights	O
holder	O
of	O
the	O
Double	B-Application
Dragon	I-Application
series	O
at	O
the	O
time	O
)	O
for	O
the	O
Game	B-Device
Boy	I-Device
Advance	I-Device
.	O
</s>
<s>
In	O
2009	B-Application
,	O
a	O
remake	O
was	O
released	O
for	O
the	O
Zeebo	B-Device
,	O
developed	O
by	O
Brizo	O
Interactive	O
and	O
published	O
by	O
Tectoy	O
.	O
</s>
<s>
In	O
2011	B-Application
,	O
another	O
remake	O
was	O
released	O
for	O
the	O
iPhone	B-Operating_System
,	O
developed	O
by	O
Brizo	O
Interactive	O
and	O
published	O
by	O
Aksys	O
Games	O
.	O
</s>
<s>
WayForward	O
Technologies	O
developed	O
Double	B-Application
Dragon	I-Application
Neon	I-Application
,	O
a	O
self-parody	O
of	O
the	O
series	O
.	O
</s>
<s>
The	O
game	O
was	O
released	O
on	O
September	O
11	O
,	O
2012	O
,	O
for	O
the	O
PlayStation	B-Operating_System
3	I-Operating_System
on	O
PlayStation	B-Device
Network	I-Device
;	O
one	O
day	O
later	O
for	O
the	B-Operating_System
Xbox	I-Operating_System
360	I-Operating_System
on	O
Xbox	B-Application
Live	I-Application
;	O
and	O
was	O
released	O
for	O
PC	B-Device
in	O
the	O
first	O
quarter	O
of	O
2014	O
.	O
</s>
<s>
Double	B-Application
Dragon	I-Application
II	I-Application
:	O
Wander	O
of	O
the	O
Dragons	O
,	O
a	O
3D	O
remake	O
of	O
the	O
original	O
Double	B-Application
Dragon	I-Application
II	I-Application
,	O
was	O
released	O
on	O
the	O
Xbox	B-Device
Live	I-Device
Arcade	I-Device
by	O
game	O
developer	O
Gravity	O
in	O
April	O
2013	B-Application
.	O
</s>
<s>
A	O
compilation	O
of	O
the	O
three	O
arcade	O
titles	O
,	O
titled	O
Double	B-Application
Dragon	I-Application
Trilogy	O
,	O
was	O
released	O
by	O
DotEmu	O
in	O
2013	B-Application
for	O
iOS	B-Application
,	O
Android	B-Application
,	O
GOG	O
and	O
Steam	B-Application
platforms	O
.	O
</s>
<s>
A	O
new	O
title	O
in	O
the	O
series	O
,	O
titled	O
Double	B-Application
Dragon	I-Application
IV	I-Application
(	O
not	O
to	O
be	O
confused	O
with	O
Super	B-Application
Double	I-Application
Dragon	I-Application
)	O
,	O
was	O
released	O
in	O
January	O
2017	O
,	O
for	O
the	B-Operating_System
PlayStation	I-Operating_System
4	I-Operating_System
and	O
PC	B-Device
,	O
respectively	O
,	O
and	O
September	O
7	O
for	O
the	O
Nintendo	B-Application
Switch	I-Application
.	O
</s>
<s>
It	O
takes	O
place	O
shortly	O
after	O
Double	B-Application
Dragon	I-Application
II	I-Application
:	I-Application
The	I-Application
Revenge	I-Application
and	O
uses	O
an	O
8-bit	O
artstyle	O
,	O
similar	O
to	O
the	O
NES	O
ports	O
of	O
the	O
earlier	O
entries	O
of	O
the	O
series	O
.	O
</s>
<s>
Super	B-Application
Spike	I-Application
V'Ball	I-Application
(	O
NES	O
)	O
–	O
the	O
NES	O
version	O
which	O
features	O
Billy	O
and	O
Jimmy	O
as	O
playable	O
characters	O
.	O
</s>
<s>
WWF	B-Application
Superstars	I-Application
(	O
arcade	O
)	O
–	O
features	O
a	O
cameo	O
by	O
Billy	O
as	O
one	O
of	O
the	O
game	O
's	O
spectators	O
.	O
</s>
<s>
River	B-Application
City	I-Application
Ransom	I-Application
(	O
NES	O
)	O
–	O
the	O
Double	B-Application
Dragon	I-Application
theme	O
music	O
plays	O
during	O
the	O
battle	O
against	O
Randy	O
and	O
Andy	O
,	O
two	O
characters	O
based	O
on	O
Billy	O
and	O
Jimmy	O
.	O
</s>
<s>
Abobo	O
appears	O
as	O
a	O
recurring	O
enemy	O
in	O
the	O
sequel	O
,	O
River	B-Application
City	I-Application
Ransom	I-Application
Underground	O
.	O
</s>
<s>
Battletoads/Double	B-Application
Dragon	I-Application
(	O
NES	O
,	O
GB	O
,	O
Genesis	B-Operating_System
,	O
SNES	B-Application
)	O
–	O
a	O
crossover	O
game	O
between	O
the	O
Double	B-Application
Dragon	I-Application
and	O
Battletoads	B-Device
franchises	O
.	O
</s>
<s>
Voltage	B-Application
Fighter	I-Application
Gowcaizer	I-Application
(	O
Neo	B-Application
Geo	I-Application
)	O
–	O
Burnov	O
from	O
the	O
Neo	B-Application
Geo	I-Application
Double	B-Application
Dragon	I-Application
game	O
makes	O
a	O
cameo	O
as	O
Captain	O
Atlantis	O
 '	O
opponent	O
in	O
his	O
ending	O
.	O
</s>
<s>
Rage	B-Application
of	I-Application
the	I-Application
Dragons	I-Application
(	O
Neo	B-Application
Geo	I-Application
)	O
–	O
an	O
unofficial	O
homage	O
to	O
Double	B-Application
Dragon	I-Application
produced	O
by	O
Evoga	O
and	O
Noise	O
Factory	O
in	O
association	O
with	O
Playmore	O
which	O
become	O
the	O
current	O
incarnation	O
of	O
SNK	O
.	O
</s>
<s>
Abobo	B-Operating_System
's	I-Operating_System
Big	I-Operating_System
Adventure	I-Operating_System
(	O
PC	B-Device
)	O
–	O
an	O
unofficial	O
parody	O
of	O
various	O
Nintendo	O
Entertainment	O
System	O
titles	O
,	O
including	O
Double	B-Application
Dragon	I-Application
,	O
and	O
starring	O
Abobo	O
as	O
the	O
main	O
character	O
.	O
</s>
<s>
River	O
City	O
:	O
Rival	O
Showdown	O
(	O
3DS	O
)	O
–	O
both	O
Billy	B-Application
and	I-Application
Jimmy	I-Application
Lee	I-Application
are	O
playable	O
characters	O
in	O
the	O
Double	B-Application
Dragon	I-Application
Duel	O
mode	O
.	O
</s>
<s>
River	B-Application
City	I-Application
Girls	I-Application
(	O
PC	B-Device
,	O
Switch	O
,	O
PlayStation	B-Operating_System
4	I-Operating_System
,	O
PlayStation	B-Device
5	I-Device
,	O
Xbox	B-Device
One	I-Device
)	O
–	O
the	O
Lee	O
Brothers	O
have	O
two	O
Dojos	O
in	O
River	O
City	O
,	O
where	O
the	O
player	O
characters	O
can	O
acquire	O
new	O
fighting	O
moves	O
from	O
the	O
brothers	O
in	O
exchange	O
for	O
money	O
.	O
</s>
<s>
River	B-Application
City	I-Application
Girls	I-Application
2	I-Application
(	O
PC	B-Device
,	O
Switch	O
,	O
PlayStation	B-Operating_System
4	I-Operating_System
,	O
PlayStation	B-Device
5	I-Device
,	O
Xbox	B-Device
One	I-Device
,	O
Xbox	B-Device
Series	I-Device
XS	I-Device
)	O
–	O
Marian	O
appears	O
as	O
a	O
playable	O
character	O
.	O
</s>
<s>
A	O
Double	B-Application
Dragon	I-Application
comic	O
book	O
limited	O
series	O
loosely	O
based	O
on	O
the	O
games	O
was	O
published	O
by	O
Marvel	O
Comics	O
in	O
1991	B-Application
,	O
which	O
lasted	O
six	O
issues	O
from	O
July	O
to	O
December	O
.	O
</s>
<s>
Double	B-Application
Dragon	I-Application
is	I-Application
one	O
of	O
the	O
video	O
games	O
featured	O
in	O
the	O
manga	O
,	O
titled	O
Rock'n	O
Game	B-Device
Boy	I-Device
by	O
Shigeto	O
Ikehara	O
,	O
in	O
Comic	O
BomBom	O
from	O
October	O
1989	B-Application
to	O
December	O
1991	B-Application
.	O
</s>
<s>
A	O
Double	B-Application
Dragon	I-Application
animated	O
series	O
was	O
produced	O
by	O
DIC	O
Animation	O
City	O
and	O
Bohbot	O
Entertainment	O
,	O
which	O
originally	O
aired	O
in	O
syndication	O
on	O
Bohbot	O
's	O
Amazin	O
 '	O
Adventures	O
block	O
for	O
two	O
seasons	O
from	O
1993	O
to	O
1995	B-Application
,	O
lasting	O
26	O
episodes	O
.	O
</s>
<s>
A	O
film	O
version	O
of	O
Double	B-Application
Dragon	I-Application
was	O
released	O
in	O
theaters	O
in	O
1994	B-Application
,	O
directed	O
by	O
James	O
Yukich	O
and	O
starring	O
Scott	O
Wolf	O
and	O
Mark	O
Dacascos	O
as	O
the	O
Lee	O
brothers	O
.	O
</s>
<s>
The	O
Lee	O
brothers	O
are	O
characterized	O
as	O
successors	O
of	O
a	O
fictional	O
martial	O
art	O
known	O
as	O
,	O
which	O
combines	O
techniques	O
from	O
other	O
styles	O
such	O
as	O
karate	B-Application
,	O
tai	O
chi	O
and	O
Shorinji	O
Kempo	O
.	O
</s>
<s>
The	O
names	O
Billy	B-Application
and	I-Application
Jimmy	I-Application
Lee	I-Application
were	O
first	O
established	O
in	O
the	O
Famicom/NES	O
version	O
of	O
the	O
first	O
game	O
and	O
consequently	O
used	O
in	O
other	O
console	O
versions	O
and	O
tie-in	O
products	O
such	O
as	O
The	O
Original	O
Sound	O
of	O
Double	B-Application
Dragon	I-Application
soundtrack	O
album	O
,	O
but	O
were	O
not	O
actually	O
used	O
in	O
the	O
arcade	O
versions	O
until	O
Double	B-Application
Dragon	I-Application
3	I-Application
:	I-Application
The	I-Application
Rosetta	I-Application
Stone	I-Application
.	O
</s>
<s>
Billy	O
Lee	O
's	O
name	O
comes	O
from	O
a	O
combination	O
of	O
Bruce	B-Application
Lee	I-Application
's	O
last	O
name	O
with	O
the	O
first	O
name	O
of	O
his	O
character	O
Billy	O
Lo	O
from	O
the	O
movie	O
Game	O
of	O
Death	O
,	O
while	O
Jimmy	O
is	O
named	O
after	O
musician	O
Jimmy	O
Page	O
.	O
</s>
<s>
Super	B-Application
Double	I-Application
Dragon	I-Application
was	O
the	O
first	O
game	O
to	O
have	O
the	O
Lee	O
brothers	O
sport	O
different	O
hairstyles	O
during	O
gameplay	O
,	O
with	O
Billy	O
being	O
given	O
a	O
laid	O
down	O
hairstyle	O
and	O
Jimmy	O
a	O
spiky	O
flat	O
top	O
,	O
a	O
design	O
convention	O
adopted	O
by	O
later	O
games	O
such	O
as	O
Double	B-Application
Dragon	I-Application
Advance	I-Application
and	O
the	O
smartphone	O
versions	O
,	O
although	O
some	O
of	O
the	O
promotional	O
art	O
and	O
in-game	O
visuals	O
for	O
the	O
earlier	O
games	O
(	O
such	O
as	O
the	O
ending	O
photograph	O
of	O
Double	B-Application
Dragon	I-Application
II	I-Application
:	I-Application
The	I-Application
Revenge	I-Application
and	O
the	O
story	O
sequences/character	O
portraits	O
of	O
Double	B-Application
Dragon	I-Application
III	I-Application
:	I-Application
The	I-Application
Sacred	I-Application
Stones	I-Application
)	O
had	O
already	O
depicted	O
the	O
Lee	O
brothers	O
with	O
differing	O
hairstyles	O
.	O
</s>
<s>
Other	O
games	O
such	O
as	O
the	O
Neo	B-Application
Geo	I-Application
fighting	I-Application
game	I-Application
and	O
Double	B-Application
Dragon	I-Application
Neon	I-Application
depict	O
the	O
Lee	O
brothers	O
as	O
identical	O
twins	O
like	O
in	O
the	O
first	O
arcade	O
game	O
.	O
</s>
<s>
The	O
enemy	O
organization	O
in	O
the	O
original	O
Double	B-Application
Dragon	I-Application
are	O
the	O
Black	O
Warriors	O
gang	O
,	O
who	O
are	O
characterized	O
as	O
the	O
dominant	O
criminal	O
organization	O
in	O
New	O
York	O
City	O
after	O
a	O
nuclear	O
war	O
has	O
left	O
the	O
city	O
deprived	O
of	O
any	O
law	O
and	O
order	O
.	O
</s>
<s>
While	O
the	O
arcade	O
version	O
of	O
Double	B-Application
Dragon	I-Application
II	I-Application
:	I-Application
The	I-Application
Revenge	I-Application
had	O
Willy	O
and	O
the	O
Black	O
Warriors	O
retaliating	O
against	O
their	O
earlier	O
defeat	O
by	O
gunning	O
down	O
Marian	O
,	O
the	O
Famicom	O
version	O
replaced	O
Willy	O
with	O
a	O
nameless	O
fighter	O
who	O
led	O
a	O
mysterious	O
armed	O
group	O
following	O
the	O
dissolution	O
of	O
the	O
original	O
Black	O
Warriors	O
.	O
</s>
<s>
While	O
unnamed	O
in	O
the	O
Japanese	O
version	O
,	O
the	O
English	O
localization	O
of	O
the	O
NES	O
version	O
would	O
refer	O
to	O
this	O
organization	O
as	O
the	O
Shadow	B-Application
Warriors	I-Application
(	O
or	O
the	O
Black	O
Shadow	B-Application
Warriors	I-Application
in	O
the	O
manual	O
)	O
,	O
a	O
name	O
later	O
used	O
for	O
an	O
unrelated	O
enemy	O
group	O
in	O
Super	B-Application
Double	I-Application
Dragon	I-Application
,	O
as	O
well	O
as	O
Willy	O
's	O
own	O
gang	O
in	O
Double	B-Application
Dragon	I-Application
Advance	I-Application
.	O
</s>
<s>
The	O
Shadow	B-Application
Warriors	I-Application
was	O
also	O
the	O
name	O
of	O
the	O
villain	O
group	O
in	O
the	O
Double	B-Application
Dragon	I-Application
animated	O
series	O
and	O
its	O
tie-in	O
game	O
,	O
Double	B-Application
Dragon	I-Application
V	I-Application
:	I-Application
The	I-Application
Shadow	I-Application
Falls	I-Application
,	O
where	O
they	O
consisted	O
almost	O
entirely	O
of	O
new	O
characters	O
.	O
</s>
<s>
Other	O
characters	O
seem	O
to	O
follow	O
a	O
similar	O
naming	O
convention	O
such	O
as	O
Linda	O
,	O
who	O
shares	O
her	O
name	O
with	O
Bruce	B-Application
Lee	I-Application
's	O
widow	O
Linda	O
Lee	O
Cadwell	O
,	O
and	O
the	O
enemy	O
character	O
Bolo	O
from	O
Double	B-Application
Dragon	I-Application
II	I-Application
:	I-Application
The	I-Application
Revenge	I-Application
,	O
who	O
shares	O
his	O
name	O
with	O
actor	O
Bolo	O
Yeung	O
.	O
</s>
<s>
The	O
gameplay	O
in	O
most	O
of	O
the	O
games	O
takes	O
place	O
in	O
a	O
pseudo	O
3D	O
perspective	O
like	O
in	O
Renegade	B-Application
and	O
later	O
beat-	B-Application
'	I-Application
em-ups	I-Application
,	O
in	O
which	O
the	O
player	O
character	O
can	O
move	O
in	O
four	O
directions	O
but	O
are	O
always	O
facing	O
left	O
or	O
right	O
.	O
</s>
<s>
While	O
not	O
the	O
first	O
games	O
in	O
the	O
genre	O
,	O
the	O
original	O
Double	B-Application
Dragon	I-Application
titles	O
laid	O
the	O
foundations	O
for	O
modern	O
beat	B-Application
'	I-Application
em	I-Application
up	I-Application
games	I-Application
.	O
</s>
<s>
They	O
influenced	O
the	O
creation	O
of	O
titles	O
such	O
as	O
Golden	B-Application
Axe	I-Application
,	O
Ninja	B-Application
Gaiden	I-Application
and	O
Final	B-Application
Fight	I-Application
,	O
which	O
firmly	O
established	O
beat	B-Application
'	I-Application
em	I-Application
ups	I-Application
as	O
a	O
popular	O
game	O
genre	O
.	O
</s>
<s>
Double	B-Application
Dragon	I-Application
ushered	O
in	O
a	O
"	O
Golden	O
Age	O
"	O
for	O
the	O
beat	B-Application
'	I-Application
em	I-Application
up	I-Application
genre	O
that	O
took	O
it	O
to	O
new	O
heights	O
with	O
its	O
detailed	O
set	O
of	O
martial	O
arts	O
attacks	O
and	O
its	O
two-player	O
cooperative	O
gameplay	O
.	O
</s>
<s>
Double	O
Dragon'''s	O
success	O
resulted	O
in	O
a	O
flood	O
of	O
beat	B-Application
'	I-Application
em	I-Application
ups	I-Application
in	O
the	O
late	O
1980s	O
.	O
</s>
<s>
Subsequent	O
beat	B-Application
'	I-Application
em	I-Application
ups	I-Application
during	O
the	O
late	O
1980s	O
to	O
1990s	O
followed	O
the	O
conventions	O
set	O
by	O
Double	B-Application
Dragon	I-Application
.	O
</s>
<s>
Years	O
later	O
,	O
original	O
series	O
creator	O
Yoshihisa	O
Kishimoto	O
lamented	O
the	O
inconsistency	O
in	O
design	O
and	O
quality	O
of	O
the	O
various	O
versions	O
and	O
spin-offs	O
of	O
Double	B-Application
Dragon	I-Application
in	O
games	O
and	O
other	O
media	O
.	O
</s>
