<s>
Based	O
on	O
Id	O
Software	O
's	O
open	O
stance	O
towards	O
game	O
modifications	O
,	O
their	O
Quake	B-Application
series	O
became	O
a	O
popular	O
subject	O
for	O
player	O
mods	O
beginning	O
with	O
Quake	B-Application
in	O
1996	O
.	O
</s>
<s>
Spurred	O
by	O
user-created	O
hacked	O
content	O
on	O
their	O
previous	O
games	O
and	O
the	O
company	O
's	O
desire	O
to	O
encourage	O
the	O
hacker	O
ethic	O
,	O
Id	O
included	O
dedicated	O
modification	O
tools	O
into	O
Quake	B-Application
,	O
including	O
the	O
QuakeC	O
programming	O
language	O
and	O
a	O
level	O
editor	O
.	O
</s>
<s>
As	O
a	O
game	O
that	O
popularized	O
online	O
first-person	O
shooter	O
multiplayer	O
,	O
early	O
games	O
were	O
team	O
-	O
and	O
strategy-based	O
and	O
led	O
to	O
prominent	O
mods	O
like	O
Team	B-Application
Fortress	I-Application
,	O
whose	O
developers	O
were	O
later	O
hired	O
by	O
Valve	O
to	O
create	O
a	O
dedicated	O
version	O
for	O
the	O
company	O
.	O
</s>
<s>
Id	O
's	O
openness	O
and	O
modding	O
tools	O
led	O
to	O
a	O
"	O
Quake	B-Application
movie	O
"	O
community	O
,	O
which	O
altered	O
gameplay	O
data	O
to	O
add	O
camera	O
angles	O
in	O
post-production	O
,	O
a	O
practice	O
that	O
became	O
known	O
as	O
machinima	O
.	O
</s>
<s>
Id	O
Software	O
founders	O
John	O
Carmack	O
and	O
John	O
Romero	O
were	O
instead	O
excited	O
when	O
their	O
Wolfenstein	B-Application
3D	I-Application
was	O
hacked	O
to	O
swap	O
content	O
into	O
the	O
game	O
,	O
and	O
decided	O
to	O
help	O
rather	O
than	O
hinder	O
the	O
hacker	O
ethic	O
of	O
those	O
who	O
would	O
modify	O
their	O
later	O
games	O
,	O
including	O
Doom	B-Application
and	O
Quake	B-Application
.	O
</s>
<s>
Doom	B-Application
added	O
new	O
graphical	O
detail	O
to	O
its	O
first-person	O
shooter	O
predecessors	O
(	O
wall	O
textures	O
,	O
varied	O
environments	O
)	O
and	O
local	O
,	O
networked	O
multiplayer	O
,	O
but	O
in	O
1996	O
,	O
Quake	B-Application
too	O
added	O
better	O
graphics	O
in	O
a	O
fully	O
3D	O
world	O
but	O
became	O
known	O
for	O
its	O
Internet-based	O
,	O
long-distance	O
multiplayer	O
.	O
</s>
<s>
It	O
popularized	O
consumer	O
graphics	O
cards	O
with	O
its	O
implementation	O
of	O
3D	O
rendering	O
under	O
OpenGL	B-Application
technology	O
,	O
and	O
its	O
dedicated	O
developer	O
tools	O
encouraged	O
users	O
to	O
create	O
their	O
own	O
modifications	O
,	O
spawning	O
a	O
"	O
healthy	O
mod	O
scene	O
"	O
.	O
</s>
<s>
Around	O
the	O
time	O
of	O
Quake	B-Application
release	O
,	O
these	O
user	O
modifications	O
became	O
known	O
as	O
just	O
"	O
mods	O
"	O
.	O
</s>
<s>
Modding	O
was	O
made	O
easy	O
for	O
Quake	B-Application
players	O
,	O
who	O
could	O
download	O
level	O
editors	O
and	O
the	O
QuakeC	O
programming	O
language	O
to	O
make	O
their	O
own	O
mods	O
and	O
content	O
.	O
</s>
<s>
Among	O
the	O
first	O
successful	O
mods	O
were	O
Capture	O
the	O
Flag	O
and	O
Team	B-Application
Fortress	I-Application
.	O
</s>
<s>
Valve	O
recruited	O
its	O
first	O
employees	O
from	O
the	O
Quake	B-Application
modding	O
community	O
,	O
as	O
the	O
Team	B-Application
Fortress	I-Application
team	O
was	O
invited	O
to	O
create	O
its	O
sequel	O
for	O
Valve	O
's	O
first	O
game	O
,	O
Half-Life	B-Application
—	O
itself	O
built	O
on	O
modifications	O
of	O
the	O
Quake	B-Application
II	I-Application
game	O
engine	O
.	O
</s>
<s>
In	O
1997	O
,	O
a	O
"	O
total	O
conversion	O
"	O
Quake	B-Application
mod	O
named	O
"	O
Alien	O
Quake	B-Application
"	O
replaced	O
characters	O
,	O
levels	O
,	O
and	O
sounds	O
with	O
replacements	O
from	O
the	O
Alien	O
film	O
franchise	O
.	O
</s>
<s>
Id	O
's	O
choice	O
to	O
create	O
and	O
share	O
an	O
editor	O
and	O
scripting	O
language	O
with	O
Quake	B-Application
spurred	O
its	O
modding	O
community	O
and	O
led	O
to	O
unforeseen	O
innovations	O
,	O
such	O
as	O
animated	O
movies	O
performed	O
by	O
players	O
during	O
gameplay	O
.	O
</s>
<s>
There	O
have	O
been	O
two	O
attempts	O
to	O
create	O
free	O
content	O
game	O
data	O
for	O
Quake	B-Application
similar	O
to	O
OpenArena	B-Application
or	O
Freedoom	O
.	O
</s>
<s>
The	O
art	O
of	O
using	O
video	O
games	O
to	O
create	O
narrative	O
videos	O
rather	O
than	O
gameplay	O
rose	O
from	O
the	O
"	O
Quake	B-Application
movie	O
"	O
community	O
and	O
became	O
known	O
as	O
machinima	O
.	O
</s>
<s>
Players	O
of	O
Quake	B-Application
and	O
Quake	B-Application
II	I-Application
created	O
programs	O
to	O
alter	O
the	O
game	O
's	O
demo	O
files	O
,	O
which	O
contained	O
records	O
of	O
the	O
game	O
's	O
user	O
input	O
and	O
events	O
.	O
</s>
<s>
The	O
Quake	B-Application
tools	O
created	O
for	O
these	O
purposes	O
led	O
to	O
dedicated	O
machinima	O
post-production	O
utilities	O
,	O
such	O
as	O
David	O
"	O
CRT	O
"	O
Wright	O
's	O
Keygrip	O
and	O
Keygrip2	O
.	O
</s>
<s>
Even	O
as	O
more	O
advanced	O
tools	O
were	O
produced	O
,	O
players	O
opted	O
to	O
their	O
own	O
homegrown	O
tools	O
and	O
retain	O
the	O
"	O
Quake	B-Application
movie	O
"	O
-style	O
production	O
as	O
their	O
own	O
user-generated	O
process	O
.	O
</s>
<s>
Among	O
the	O
most	O
popular	O
Quake	B-Application
II	I-Application
mods	O
was	O
Chaos	O
Deathmatch	O
by	O
Chaotic	O
Dream	O
Group	O
.	O
</s>
<s>
Qoole	O
,	O
short	O
for	O
Quake	B-Application
Object	O
Oriented	O
Level	O
Editor	O
,	O
is	O
a	O
level	O
editor	O
for	O
video	O
games	O
based	O
on	O
the	O
Quake	B-Application
engine	I-Application
,	O
and	O
was	O
developed	O
by	O
Lithium	O
Software	O
.	O
</s>
<s>
Among	O
the	O
supported	O
games	O
are	O
the	O
original	O
Quake	B-Application
I	I-Application
and	O
Quake	B-Application
II	I-Application
,	O
Hexen	B-Application
II	I-Application
and	O
Half-Life	B-Application
.	O
</s>
<s>
It	O
uses	O
a	O
brush-based	O
method	O
to	O
construct	O
new	O
maps	O
,	O
in	O
which	O
monsters	O
,	O
items	O
and	O
lights	O
can	O
be	O
placed	O
,	O
or	O
any	O
of	O
the	O
on-board	O
prefabs	O
.	O
</s>
<s>
It	O
was	O
originally	O
sold	O
on	O
a	O
CD-ROM	B-Device
,	O
but	O
the	O
source	O
code	O
was	O
eventually	O
released	O
under	O
the	O
GPL	B-License
v2	O
.	O
</s>
<s>
In	O
2000	O
,	O
Id	O
transferred	O
maintenance	O
control	O
of	O
the	O
Quake	B-Application
III	O
Arena	O
level	O
editor	O
tools	O
(	O
Q3Radiant	O
)	O
to	O
community	O
programmers	O
,	O
who	O
added	O
new	O
features	O
and	O
released	O
the	O
result	O
as	O
the	O
Windows	O
-	O
and	O
Linux-compatible	O
GtkRadiant	O
.	O
</s>
<s>
It	O
became	O
one	O
of	O
Quake	B-Application
most	O
used	O
level	O
editors	O
and	O
was	O
later	O
released	O
under	O
the	O
GNU	B-License
General	I-License
Public	I-License
License	I-License
.	O
</s>
