<s>
The	O
terms	O
are	O
most	O
often	O
used	O
in	O
games	O
where	O
both	O
activities	O
exist	O
,	O
particularly	O
MMORPGs	B-Protocol
,	O
MUDs	B-Application
,	O
and	O
other	O
role-playing	O
video	O
games	O
,	O
to	O
distinguish	O
between	O
gamemodes	O
.	O
</s>
<s>
PvP	O
combat	O
in	O
CRPGs	O
has	O
its	O
roots	O
in	O
various	O
MUDs	B-Application
like	O
Gemstone	B-Protocol
II	I-Protocol
and	O
Avalon	O
:	O
The	O
Legend	O
Lives	O
..	O
</s>
<s>
However	O
,	O
while	O
the	O
ability	O
to	O
kill	O
another	O
player	O
existed	O
in	O
many	O
MUDs	B-Application
,	O
it	O
was	O
usually	O
frowned	O
upon	O
because	O
of	O
general	O
strict	O
adherences	O
and	O
heavy	O
influences	O
from	O
tabletop	O
role-playing	O
games	O
such	O
as	O
Dungeons	O
&	O
Dragons	O
.	O
</s>
<s>
The	O
term	O
PvP	O
originated	O
in	O
text	O
based	O
MUDs	B-Application
played	O
on	O
bulletin	O
board	O
systems	O
like	O
MajorMUD	O
and	O
Usurper	O
.	O
</s>
<s>
The	O
first	O
graphical	O
MMORPG	B-Protocol
was	O
Neverwinter	B-Application
Nights	I-Application
,	O
which	O
began	O
development	O
in	O
1989	O
and	O
ran	O
on	O
AOL	O
1991	O
–	O
1997	O
,	O
and	O
which	O
included	O
PvP	O
.	O
</s>
<s>
Much	O
of	O
the	O
PvP	O
activity	O
was	O
coordinated	O
events	O
by	O
the	O
game	O
's	O
guilds	O
,	O
which	O
were	O
the	O
first	O
such	O
organized	O
user	O
groups	O
in	O
MMORPGs	B-Protocol
.	O
</s>
<s>
Genocide	B-Protocol
,	O
an	O
LPMud	B-Application
launched	O
in	O
1992	O
,	O
was	O
a	O
pioneer	O
in	O
PvP	O
conflict	O
as	O
the	O
first	O
"	O
pure	O
PK	O
"	O
MUD	B-Application
,	O
removing	O
all	O
non-PvP	O
gameplay	O
and	O
discarding	O
the	O
RPG-style	O
character	O
development	O
normally	O
found	O
in	O
MUDs	B-Application
in	O
favor	O
of	O
placing	O
characters	O
on	O
an	O
even	O
footing	O
,	O
with	O
only	O
player	O
skill	O
providing	O
an	O
advantage	O
.	O
</s>
<s>
Extremely	O
popular	O
,	O
its	O
ideas	O
influenced	O
the	O
MUD	B-Application
world	O
heavily	O
.	O
</s>
<s>
Other	O
early	O
MMORPGs	B-Protocol
,	O
including	O
Meridian	B-Protocol
59	I-Protocol
(	O
1996	O
)	O
,	O
Ultima	B-Protocol
Online	I-Protocol
(	O
1997	O
)	O
,	O
and	O
Tibia	B-Protocol
(	O
1997	O
)	O
also	O
had	O
PvP	O
combat	O
as	O
a	O
feature	O
.	O
</s>
<s>
In	O
Ultima	B-Protocol
Online	I-Protocol
,	O
the	O
goal	O
was	O
to	O
allow	O
players	O
to	O
police	O
themselves	O
in	O
a	O
"	O
frontier	O
justice	O
"	O
way	O
.	O
</s>
<s>
This	O
system	O
also	O
exists	O
in	O
Tibia	B-Protocol
,	O
where	O
death	O
includes	O
significant	O
penalty	O
,	O
and	O
killing	O
someone	O
inflicts	O
considerable	O
harm	O
to	O
their	O
character	O
.	O
</s>
<s>
In	O
Meridian	B-Protocol
59	I-Protocol
,	O
the	O
game	O
tried	O
to	O
focus	O
PvP	O
by	O
having	O
different	O
political	O
factions	O
for	O
players	O
to	O
join	O
.	O
</s>
<s>
The	O
later	O
Eve	B-Protocol
Online	I-Protocol
(	O
2003	O
)	O
refined	O
Ultima	B-Protocol
Onlines	I-Protocol
original	O
approach	O
of	O
"	O
PvP	O
anywhere	O
but	O
in	O
town	O
"	O
(	O
where	O
attacking	O
another	O
player	O
is	O
dangerous	O
in	O
and	O
around	O
towns	O
due	O
to	O
interference	O
from	O
NPC	O
"	O
guards	O
"	O
)	O
.	O
</s>
<s>
With	O
the	O
popularity	O
of	O
EverQuest	B-Protocol
in	O
1999	O
,	O
primarily	O
consisting	O
of	O
PvE	O
elements	O
(	O
with	O
the	O
exception	O
of	O
limited	O
PvP	O
on	O
one	O
specific	O
server	O
)	O
,	O
PvP	O
became	O
a	O
negative	O
for	O
some	O
newer/casual	O
MMORPG	B-Protocol
players	O
and	O
developers	O
looking	O
to	O
draw	O
a	O
larger	O
crowd	O
.	O
</s>
<s>
In	O
2000	O
,	O
in	O
response	O
to	O
complaints	O
about	O
malicious	O
player-killers	O
,	O
Ultima	B-Protocol
Online	I-Protocol
controversially	O
added	O
an	O
extra	O
copy	O
of	O
the	O
game	O
world	O
to	O
each	O
server	O
in	O
which	O
open	O
PvP	O
was	O
disabled	O
.	O
</s>
<s>
An	O
example	O
of	O
this	O
type	O
of	O
PvP	O
element	O
can	O
be	O
found	O
on	O
MMOs	O
such	O
as	O
Audition	B-Application
Online	I-Application
(	O
2004	O
)	O
where	O
while	O
players	O
are	O
not	O
directly	O
killing	O
each	O
other	O
's	O
avatars	O
as	O
traditionally	O
found	O
in	O
MMOs	O
,	O
they	O
are	O
still	O
competing	O
against	O
each	O
other	O
during	O
certain	O
game	O
modes	O
in	O
a	O
Player	O
versus	O
Player	O
setting	O
.	O
</s>
<s>
PvP	O
has	O
been	O
included	O
in	O
other	O
games	O
such	O
as	O
Asheron	B-Application
's	I-Application
Call	I-Application
in	O
late	O
1999	O
,	O
Diablo	B-Application
II	I-Application
in	O
2000	O
,	O
Dark	B-Protocol
Age	I-Protocol
of	I-Protocol
Camelot	I-Protocol
and	O
RuneScape	B-Protocol
in	O
2001	O
,	O
Asheron	B-Protocol
's	I-Protocol
Call	I-Protocol
2	I-Protocol
in	O
2002	O
,	O
Shadowbane	B-Protocol
in	O
2003	O
,	O
and	O
Dragon	B-Application
Nest	I-Application
in	O
2011	O
.	O
</s>
<s>
DOOM	B-Application
was	O
one	O
of	O
the	O
most	O
influential	O
instances	O
of	O
PvP	O
,	O
coining	O
the	O
term	O
"	O
Deathmatch	O
"	O
.	O
</s>
<s>
In	O
Ultima	B-Protocol
Online	I-Protocol
and	O
Asheron	B-Application
's	I-Application
Call	I-Application
,	O
a	O
rift	O
formed	O
between	O
those	O
who	O
enjoyed	O
PKing	O
,	O
those	O
who	O
enjoyed	O
hunting	O
the	O
PKs	O
and	O
those	O
who	O
simply	O
did	O
not	O
want	O
to	O
fight	O
at	O
all	O
.	O
</s>
<s>
Asheron	B-Application
's	I-Application
Call	I-Application
contained	O
a	O
server	O
that	O
was	O
completely	O
unrestricted	O
in	O
player	O
interactions	O
where	O
massive	O
"	O
PK	O
"	O
and	O
"	O
Anti	O
(	O
PK	O
)	O
"	O
dynasties	O
formed	O
.	O
</s>
<s>
Permanent	B-Application
death	I-Application
(	O
such	O
that	O
the	O
player	O
must	O
create	O
a	O
new	O
character	O
)	O
is	O
relatively	O
uncommon	O
in	O
online	O
games	O
,	O
especially	O
if	O
PKing	O
is	O
permitted	O
.	O
</s>
<s>
An	O
example	O
of	O
such	O
a	O
mode	O
is	O
Hardcore	B-Application
mode	I-Application
on	O
the	O
game	O
Diablo	B-Application
II	I-Application
.	O
</s>
<s>
Often	O
motivated	O
by	O
an	O
overpopulation	O
of	O
in-game	O
player	O
killers	O
,	O
vigilante	B-Application
Anti-PKs	O
hunt	O
Player	O
Killers	O
and	O
Player	O
Griefers	O
with	O
vengeance	O
.	O
</s>
<s>
Voice	B-Protocol
chat	I-Protocol
or	O
in-game	O
emotes	O
are	O
often	O
utilized	O
to	O
demonstrate	O
peacefulness	O
and	O
keep	O
others	O
from	O
attacking	O
.	O
</s>
<s>
Dueling	O
ladders	O
and	O
leagues	O
set	O
up	O
by	O
fans	O
are	O
common	O
for	O
most	O
MMORPGs	B-Protocol
that	O
have	O
PvP	O
.	O
</s>
<s>
Dark	B-Protocol
Age	I-Protocol
of	I-Protocol
Camelot	I-Protocol
was	O
the	O
first	O
graphical	O
MMORPG	B-Protocol
to	O
debut	O
a	O
formal	O
dueling	O
system	O
in-game	O
(	O
Ballista	O
)	O
;	O
other	O
MMORPGs	B-Protocol
such	O
as	O
City	B-Application
of	I-Application
Heroes	I-Application
,	O
Anarchy	B-Protocol
Online	I-Protocol
,	O
World	B-Protocol
of	I-Protocol
Warcraft	I-Protocol
,	O
Guild	B-Application
Wars	I-Application
,	O
Lineage	B-Protocol
2	I-Protocol
,	O
Wurm	B-Protocol
Online	I-Protocol
,	O
and	O
RuneScape	B-Protocol
feature	O
PvP	O
as	O
competitive	O
dueling	O
in	O
a	O
group	O
setting	O
.	O
</s>
<s>
In	O
Everquest	B-Protocol
,	O
there	O
is	O
no	O
way	O
to	O
turn	O
the	O
flag	O
off	O
once	O
it	O
has	O
been	O
turned	O
on	O
.	O
</s>
<s>
In	O
World	B-Protocol
of	I-Protocol
Warcraft	I-Protocol
,	O
flagging	O
is	O
selectable	O
or	O
can	O
be	O
activated	O
by	O
attacking	O
certain	O
flagged	O
players	O
until	O
a	O
cool-off	O
period	O
ends	O
,	O
though	O
this	O
can	O
be	O
exploited	O
by	O
griefers	O
via	O
corpse	O
camping	O
.	O
</s>
<s>
Use	O
of	O
this	O
'	O
bounty	O
 '	O
system	O
is	O
not	O
standardized	O
among	O
MMORPGs	B-Protocol
,	O
and	O
there	O
are	O
debates	O
raging	O
about	O
how	O
to	O
'	O
police	O
 '	O
the	O
system	O
to	O
avoid	O
abuse	O
.	O
</s>
<s>
In	O
2001	O
,	O
Mythic	O
Entertainment	O
introduced	O
a	O
new	O
team-based	O
form	O
of	O
PvP	O
combat	O
with	O
the	O
release	O
of	O
Dark	B-Protocol
Age	I-Protocol
of	I-Protocol
Camelot	I-Protocol
.	O
</s>
<s>
This	O
was	O
a	O
new	O
concept	O
to	O
graphical	O
MMORPGs	B-Protocol
,	O
but	O
was	O
first	O
introduced	O
in	O
the	O
game	O
that	O
preceded	O
DAoC	B-Protocol
,	O
Darkness	O
Falls	O
:	O
The	O
Crusade	O
,	O
which	O
has	O
since	O
been	O
shut	O
down	O
in	O
favor	O
of	O
building	O
on	O
DAoC	B-Protocol
.	O
</s>
<s>
Other	O
MMORPG	B-Protocol
games	O
now	O
also	O
feature	O
this	O
type	O
of	O
gameplay	O
.	O
</s>
