<s>
Mugen	B-Application
(	O
stylized	O
as	O
M.U.G.E.N	B-Application
)	O
is	O
a	O
freeware	O
2D	O
fighting	O
game	O
engine	O
designed	O
by	O
Elecbyte	B-Application
.	O
</s>
<s>
It	O
is	O
written	O
in	O
C	B-Language
and	O
originally	O
used	O
the	O
Allegro	B-Language
library	I-Language
.	O
</s>
<s>
The	O
latest	O
versions	O
of	O
the	O
engine	O
use	O
the	O
SDL	B-Operating_System
library	I-Operating_System
.	O
</s>
<s>
The	O
engine	O
uses	O
four	O
directional	O
keys	O
along	O
with	O
seven	O
buttons	O
for	O
gameplay	O
(	O
A	O
,	O
B	O
,	O
C	B-Language
,	O
X	O
,	O
Y	O
,	O
Z	O
and	O
Start	O
)	O
,	O
in	O
order	O
to	O
accommodate	O
six-button	O
fighters	O
which	O
use	O
three	O
punches	O
,	O
three	O
kicks	O
and	O
a	O
start	O
button	O
which	O
is	O
often	O
a	O
taunt	O
.	O
</s>
<s>
Pre-Win	O
M.U.G.E.N	B-Application
versions	O
of	O
the	O
engine	O
could	O
have	O
this	O
feature	O
adjusted	O
or	O
disabled	O
via	O
the	O
options	O
screen	O
or	O
the	O
config	O
file	O
,	O
but	O
due	O
to	O
the	O
nature	O
of	O
the	O
hack	O
,	O
the	O
option	O
has	O
not	O
yet	O
been	O
reactivated	O
.	O
</s>
<s>
As	O
such	O
,	O
it	O
is	O
not	O
present	O
in	O
any	O
of	O
the	O
DOS	O
versions	O
of	O
M.U.G.E.N.	B-Application
</s>
<s>
Mugen	B-Application
was	O
initially	O
created	O
for	O
MS-DOS	B-Application
by	O
a	O
group	O
of	O
developers	O
from	O
Ann	O
Arbor	O
,	O
Michigan	O
.	O
</s>
<s>
Development	O
of	O
the	O
DOS	O
version	O
ceased	O
when	O
Elecbyte	B-Application
switched	O
to	O
the	O
Linux	B-Application
platform	O
in	O
November	O
2001	O
.	O
</s>
<s>
For	O
a	O
time	O
,	O
Elecbyte	B-Application
had	O
posted	O
a	O
request	O
for	O
donations	O
on	O
their	O
site	O
to	O
legally	O
obtain	O
a	O
Windows	B-Application
compiler	O
to	O
make	O
a	O
Windows	B-Application
version	O
of	O
Mugen	B-Application
.	O
</s>
<s>
Later	O
speculation	O
pointed	O
at	O
leaks	O
made	O
public	O
of	O
a	O
private	O
Windows-based	O
Mugen	B-Application
beta	O
that	O
was	O
provided	O
to	O
a	O
small	O
quantity	O
of	O
donors	O
;	O
a	O
later	O
investigation	O
in	O
2022	O
stated	O
that	O
the	O
original	O
developers	O
originally	O
created	O
Mugen	B-Application
as	O
an	O
college	O
project	O
and	O
stopped	O
development	O
after	O
the	O
original	O
developers	O
graduated	O
.	O
</s>
<s>
The	O
meaning	O
of	O
"	O
mugen	B-Application
"	O
( 無限	O
)	O
in	O
Japanese	O
,	O
"	O
unlimited	O
"	O
or	O
"	O
infinite	O
"	O
,	O
may	O
have	O
influenced	O
the	O
naming	O
.	O
</s>
<s>
Mugen	B-Application
later	O
expanded	O
into	O
a	O
wide	O
variety	O
of	O
teams	O
and	O
communities	O
such	O
as	O
Mugen	B-Application
Fighters	O
Guild	O
,	O
Mugen	B-Application
Infantry	O
,	O
Infinity	O
Mugen	B-Application
Team	O
,	O
RandomSelect	O
,	O
TheHiddenElect	O
,	O
Mugen	B-Application
Free	O
For	O
All	O
,	O
Unleaded	O
Mugen	B-Application
,	O
Mugen	B-Application
Archive	O
,	O
MugenBR	O
,	O
and	O
Pao	O
de	O
Mugen	B-Application
,	O
among	O
many	O
others	O
.	O
</s>
<s>
Mugen	B-Application
also	O
gained	O
more	O
mainstream	O
press	O
with	O
the	O
creation	O
of	O
the	O
Twitch	O
live	O
stream	O
called	O
Salty	O
's	O
Dream	O
Cast	O
Casino	O
(	O
SaltyBet	O
)	O
,	O
where	O
viewers	O
can	O
bet	O
with	O
fake	O
money	O
on	O
CPU	O
matches	O
played	O
using	O
the	O
engine	O
.	O
</s>
<s>
With	O
the	O
beta	O
leaked	O
and	O
Elecbyte	B-Application
gone	O
,	O
a	O
"	O
no	O
limit	O
"	O
hack	O
that	O
removed	O
most	O
of	O
these	O
limitations	O
was	O
made	O
available	O
in	O
2004	O
followed	O
by	O
subsequent	O
updates	O
to	O
deal	O
with	O
bugs	O
and	O
other	O
issues	O
.	O
</s>
<s>
This	O
version	O
of	O
Mugen	B-Application
is	O
functionally	O
the	O
same	O
as	O
the	O
last	O
Linux	B-Application
release	O
,	O
though	O
with	O
subtle	O
differences	O
and	O
unique	O
issues	O
mostly	O
revolving	O
around	O
proper	O
music	O
and	O
music	O
plugin	O
support	O
.	O
</s>
<s>
Because	O
of	O
the	O
changes	O
between	O
the	O
DOS	O
and	O
Linux	B-Application
versions	O
of	O
Mugen	B-Application
however	O
,	O
many	O
older	O
characters	O
required	O
at	O
least	O
the	O
SFF	O
files	O
to	O
be	O
modified	O
to	O
show	O
palettes	O
correctly	O
(	O
notably	O
on	O
portraits	O
)	O
as	O
well	O
as	O
some	O
changes	O
in	O
how	O
certain	O
CNS	O
script	O
controllers	O
functioned	O
,	O
causing	O
some	O
minor	O
upset	O
and	O
those	O
that	O
could	O
still	O
run	O
the	O
DOS	O
version	O
in	O
some	O
form	O
sticking	O
to	O
that	O
,	O
as	O
well	O
as	O
DOS	O
patches	O
to	O
downgrade	O
characters	O
to	O
be	O
compatible	O
with	O
the	O
older	O
version	O
of	O
the	O
engine	O
.	O
</s>
<s>
In	O
May	O
2007	O
,	O
a	O
hacked	O
version	O
of	O
WinMugen	O
was	O
released	O
by	O
a	O
third-party	O
that	O
added	O
support	O
for	O
high	B-Algorithm
resolution	I-Algorithm
stages	O
at	O
the	O
cost	O
of	O
losing	O
support	O
of	O
standard	O
resolution	O
Mugen	B-Application
stages	O
.	O
</s>
<s>
In	O
mid	O
2007	O
,	O
Elecbyte	B-Application
's	O
site	O
returned	O
,	O
though	O
not	O
without	O
some	O
controversy	O
as	O
to	O
the	O
legitimacy	O
of	O
it	O
,	O
as	O
it	O
only	O
showed	O
a	O
single	O
logo	O
with	O
Google	O
ads	O
on	O
the	O
side	O
.	O
</s>
<s>
On	O
September	O
19	O
,	O
2009	O
,	O
Elecbyte	B-Application
made	O
an	O
unexpected	O
comeback	O
,	O
updating	O
their	O
website	O
with	O
various	O
features	O
—	O
including	O
a	O
forum	O
and	O
a	O
downloads	O
section	O
,	O
where	O
a	O
new	O
build	O
of	O
Mugen	B-Application
was	O
available	O
.	O
</s>
<s>
In	O
September	O
2009	O
,	O
a	O
full	O
release	O
of	O
Mugen	B-Application
(	O
MUGEN	B-Application
1.0	O
Release	O
Candidate	O
)	O
that	O
includes	O
various	O
new	O
features	O
—	O
most	O
notably	O
(	O
official	O
)	O
support	O
for	O
HD	O
resolutions	O
,	O
victory	O
screens	O
and	O
language	O
localization	O
—	O
was	O
made	O
available	O
through	O
the	O
Elecbyte	B-Application
website	O
.	O
</s>
<s>
Although	O
this	O
build	O
had	O
various	O
visual	O
glitches	O
and	O
required	O
a	O
fair	O
amount	O
of	O
adjustments	O
to	O
the	O
previously	O
made	O
content	O
in	O
order	O
to	O
be	O
fully	O
compatible	O
with	O
the	O
new	O
engine	O
,	O
Elecbyte	B-Application
has	O
stated	O
that	O
it	O
is	O
their	O
goal	O
to	O
have	O
the	O
new	O
Mugen	B-Application
fully	O
compatible	O
with	O
previously	O
designed	O
content	O
.	O
</s>
<s>
On	O
January	O
18	O
,	O
2011	O
,	O
Elecbyte	B-Application
released	O
a	O
1.0	O
version	O
only	O
for	O
Windows	B-Application
,	O
ironing	O
out	O
most	O
bugs	O
that	O
were	O
featured	O
in	O
the	O
release	O
candidates	O
.	O
</s>
<s>
After	O
the	O
1.0	O
release	O
,	O
Elecbyte	B-Application
again	O
ceased	O
public	O
activity	O
for	O
an	O
extended	O
time	O
.	O
</s>
<s>
In	O
late	O
April/early	O
May	O
2013	O
,	O
a	O
leaked	O
copy	O
of	O
Mugen	B-Application
1.1	O
alpha	O
4	O
hit	O
the	O
Internet	O
.	O
</s>
<s>
In	O
August	O
2013	O
,	O
Mugen	B-Application
1.1	O
beta	O
1	O
was	O
released	O
to	O
the	O
public	O
,	O
which	O
fixes	O
many	O
of	O
the	O
bugs	O
from	O
the	O
1.1	O
alpha	O
versions	O
.	O
</s>
<s>
On	O
July	O
8	O
,	O
2014	O
,	O
a	O
fan-made	O
port	O
of	O
Mugen	B-Application
1.0	O
for	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
was	O
released	O
by	O
Mugenformac	O
,	O
built	O
using	O
the	O
"	O
Wineskin	B-Application
Winery	I-Application
"	O
wrapper	O
.	O
</s>
<s>
Since	O
2015	O
,	O
Elecbyte	B-Application
's	O
site	O
went	O
offline	O
for	O
unknown	O
reasons	O
,	O
displaying	O
a	O
403	B-Protocol
message	I-Protocol
,	O
except	O
for	O
pages	O
pertaining	O
to	O
official	O
documentation	O
;	O
Elecbyte	B-Application
's	O
last	O
activity	O
was	O
in	O
2016	O
,	O
promoting	O
a	O
crowdfunding	O
for	O
Rotten	O
Core	O
,	O
a	O
commercial	O
fighting	O
game	O
that	O
was	O
approved	O
to	O
use	O
the	O
engine	O
(	O
the	O
engine	O
's	O
license	O
typically	O
prohibited	O
commercial	O
usage	O
)	O
.	O
</s>
<s>
Many	O
websites	O
exist	O
to	O
showcase	O
and	O
disperse	O
the	O
developed	O
content	O
and	O
forms	O
in	O
what	O
is	O
often	O
referred	O
to	O
as	O
the	O
"	O
Mugen	B-Application
Community	O
"	O
.	O
</s>
<s>
Games	O
that	O
are	O
built	O
using	O
the	O
M.U.G.E.N	B-Application
engine	O
often	O
focus	O
around	O
a	O
single	O
franchise	O
,	O
such	O
as	O
Hyper	B-Application
Dragon	I-Application
Ball	I-Application
Z	I-Application
.	O
</s>
<s>
Due	O
to	O
the	O
customizable	O
nature	O
of	O
the	O
game	O
engine	O
,	O
no	O
two	O
versions	O
of	O
M.U.G.E.N	B-Application
are	O
the	O
same	O
.	O
</s>
<s>
Groups	O
of	O
M.U.G.E.N	B-Application
authors	O
will	O
often	O
collaborate	O
to	O
produce	O
a	O
full	O
game	O
using	O
the	O
engine	O
.	O
</s>
<s>
These	O
full	O
games	O
are	O
available	O
at	O
a	O
variety	O
of	O
quality	O
levels	O
and	O
are	O
released	O
under	O
the	O
general	O
M.U.G.E.N	B-Application
license	O
.	O
</s>
<s>
"	O
Under	O
this	O
license	O
,	O
permission	O
is	O
granted	O
to	O
use	O
the	O
M.U.G.E.N	B-Application
Environment	O
free	O
of	O
charge	O
for	O
non-commercial	O
purposes	O
...	O
Elecbyte	B-Application
provides	O
a	O
M.U.G.E.N	B-Application
redistributable	O
package	O
,	O
containing	O
a	O
minimal	O
M.U.G.E.N	B-Application
Environment	O
,	O
that	O
may	O
be	O
included	O
with	O
third	O
party	O
content	O
for	O
redistribution.	O
"	O
</s>
<s>
With	O
the	O
dual	O
status	O
as	O
a	O
development	O
tool	O
and	O
as	O
a	O
game	O
itself	O
,	O
Mugen	B-Application
has	O
often	O
been	O
reviewed	O
in	O
periodicals	O
and	O
magazines	O
,	O
usually	O
exhibiting	O
a	O
large	O
variety	O
of	O
works	O
from	O
various	O
authors	O
.	O
</s>
<s>
GamesRadar	O
named	O
M.U.G.E.N	B-Application
as	O
one	O
of	O
the	O
"	O
12	O
weirdest	O
fighting	O
games	O
ever	O
"	O
.	O
</s>
<s>
In	O
April	O
2017	O
,	O
Geek.com	O
selected	O
M.U.G.E.N	B-Application
as	O
the	O
"	O
Game	O
of	O
the	O
Year	O
for	O
2017	O
"	O
.	O
</s>
<s>
In	O
December	O
2021	O
,	O
An	O
article	O
from	O
Collider	O
namely	O
"	O
Top	O
5	O
Greatest	O
Crossover	O
Fighting	O
Games	O
of	O
All	O
Time	O
"	O
briefly	O
mentioned	O
M.U.G.E.N	B-Application
at	O
Super	B-Application
Smash	I-Application
Bros	I-Application
.	I-Application
</s>
