<s>
Strictly	O
,	O
a	O
private	B-Application
server	I-Application
is	O
any	O
machine	O
or	O
virtual	B-Architecture
machine	I-Architecture
used	O
as	O
a	O
server	B-Application
that	O
is	O
privately	O
administrated	O
.	O
</s>
<s>
Colloquially	O
the	O
term	O
is	O
nearly-exclusively	O
used	O
to	O
refer	O
to	O
independently	O
operated	O
,	O
unofficial	B-Application
servers	I-Application
for	O
video	O
games	O
.	O
</s>
<s>
As	O
servers	O
need	O
adequate	O
internet	O
connection	O
,	O
power	O
and	O
can	O
be	O
noisy	O
,	O
they	O
are	O
often	O
located	O
in	O
a	O
colocation	B-Application
center	I-Application
.	O
</s>
<s>
Ordinary	O
desktop	O
computers	O
are	O
not	O
suitable	O
to	O
house	O
in	O
colocation	B-Application
centers	I-Application
as	O
servers	O
have	O
specific	O
form	O
factor	O
that	O
allows	O
them	O
to	O
fit	O
many	O
into	O
a	O
standard	O
rack	O
.	O
</s>
<s>
This	O
group	O
also	O
includes	O
custom-designed	O
experimental	O
servers	O
,	O
made	O
by	O
hobbyists	O
Virtual	O
server	B-Application
also	O
offer	O
high	O
degree	O
of	O
freedom	O
,	O
superuser	B-Application
access	O
and	O
low-cost	O
service	O
.	O
</s>
<s>
A	O
private	B-Application
server	I-Application
is	O
a	O
reimplementation	B-General_Concept
in	O
online	O
game	O
servers	O
,	O
typically	O
as	O
clones	B-General_Concept
of	O
proprietary	B-Application
commercial	O
software	O
by	O
a	O
third	O
party	O
of	O
the	O
game	B-Architecture
community	I-Architecture
.	O
</s>
<s>
The	O
private	B-Application
server	I-Application
is	O
often	O
not	O
made	O
or	O
sanctioned	O
by	O
the	O
original	O
company	O
.	O
</s>
<s>
Private	B-Application
servers	I-Application
often	O
host	O
MMORPG	B-Protocol
genre	O
games	O
such	O
as	O
World	B-Protocol
of	I-Protocol
Warcraft	I-Protocol
,	O
Runescape	B-Protocol
,	O
and	O
MapleStory	B-Protocol
.	O
</s>
<s>
Many	O
private	B-Application
servers	I-Application
encourage	O
players	O
to	O
donate	O
funds	O
for	O
server	B-Application
upkeep	O
.	O
</s>
<s>
Less	O
commonly	O
,	O
private	B-Application
server	I-Application
operators	O
might	O
sell	O
in-game	O
benefits	O
directly	O
.	O
</s>
<s>
Rightsholding	O
companies	O
often	O
attempt	O
to	O
and	O
succeed	O
in	O
shutting	O
down	O
private	B-Application
server	I-Application
versions	O
of	O
their	O
games	O
.	O
</s>
<s>
Between	O
this	O
and	O
potential	O
for	O
operators	O
to	O
lose	O
interest	O
,	O
private	B-Application
servers	I-Application
can	O
be	O
short-lived	O
.	O
</s>
<s>
However	O
,	O
there	O
are	O
also	O
cases	O
of	O
games	O
no	O
longer	O
being	O
operated	O
by	O
the	O
rightsholders	O
,	O
in	O
which	O
case	O
a	O
private	B-Application
server	I-Application
may	O
have	O
greater	O
longevity	O
than	O
the	O
sanctioned	O
,	O
defunct	O
service	O
.	O
</s>
<s>
Due	O
to	O
how	O
private	B-Application
servers	I-Application
for	O
games	O
are	O
often	O
reverse-engineered	O
and	O
operated	O
using	O
incomplete	O
information	O
about	O
the	O
complete	O
inner	O
workings	O
of	O
the	O
original	O
game	O
,	O
it	O
is	O
common	O
for	O
standard	O
featuresets	O
to	O
be	O
incomplete	O
or	O
for	O
the	O
server	B-Application
to	O
be	O
less	O
stable	O
than	O
an	O
original	O
.	O
</s>
<s>
On	O
the	O
other	O
hand	O
,	O
it	O
is	O
common	O
for	O
homebrewed	B-Application
features	O
to	O
be	O
added	O
by	O
operators	O
.	O
</s>
