<s>
Unreal	B-Application
is	O
a	O
first-person	O
shooter	O
video	O
game	O
developed	O
by	O
Epic	O
MegaGames	O
and	O
Digital	O
Extremes	O
and	O
published	O
by	O
GT	O
Interactive	O
for	O
Microsoft	B-Application
Windows	I-Application
in	O
May	O
1998	O
.	O
</s>
<s>
It	O
was	O
powered	O
by	O
Unreal	B-Operating_System
Engine	I-Operating_System
,	O
an	O
original	O
game	O
engine	O
.	O
</s>
<s>
Since	O
the	O
release	O
of	O
Unreal	B-Application
,	O
the	O
franchise	O
has	O
had	O
one	O
sequel	B-Application
and	O
two	O
different	O
series	O
based	O
on	O
the	O
Unreal	B-Application
universe	O
.	O
</s>
<s>
Unreal	B-Application
Mission	I-Application
Pack	I-Application
:	I-Application
Return	I-Application
to	I-Application
Na	I-Application
Pali	I-Application
,	O
developed	O
by	O
Legend	O
Entertainment	O
,	O
was	O
released	O
in	O
June	O
1999	O
,	O
and	O
added	O
17	O
new	O
missions	O
to	O
the	O
single-player	O
campaign	O
of	O
Unreal	B-Application
.	O
</s>
<s>
Unreal	B-Application
and	O
Return	B-Application
to	I-Application
Na	I-Application
Pali	I-Application
would	O
later	O
be	O
bundled	O
together	O
as	O
Unreal	B-Application
Gold	I-Application
.	O
</s>
<s>
Additionally	O
,	O
the	O
games	O
were	O
updated	O
to	O
run	O
on	O
the	O
Unreal	B-Operating_System
Tournament	I-Operating_System
version	O
of	O
the	O
game	O
engine	O
.	O
</s>
<s>
The	O
player	O
takes	O
on	O
the	O
part	O
of	O
Prisoner	O
849	O
,	O
aboard	O
the	O
prison	O
spacecraft	O
Vortex	B-Application
Rikers	I-Application
.	O
</s>
<s>
The	O
ship	O
crash-lands	O
on	O
the	O
lip	O
of	O
a	O
canyon	O
on	O
the	O
planet	B-Application
Na	I-Application
Pali	I-Application
,	O
home	O
of	O
the	O
Nali	O
,	O
a	O
primitive	O
tribal	O
race	O
of	O
four-armed	O
humanoids	O
.	O
</s>
<s>
Skaarj	O
troops	O
board	O
the	O
downed	O
Vortex	B-Application
Rikers	I-Application
and	O
kill	O
the	O
remaining	O
survivors	O
,	O
except	O
for	O
Prisoner	O
849	O
who	O
manages	O
to	O
find	O
a	O
weapon	O
and	O
escape	O
from	O
the	O
ship	O
.	O
</s>
<s>
The	O
planet	B-Application
Na	I-Application
Pali	I-Application
is	O
rich	O
in	O
"	O
Tarydium	O
"	O
,	O
a	O
mineral	O
that	O
is	O
found	O
as	O
light	O
blue	O
crystals	O
,	O
possessing	O
a	O
high	O
energy	O
yield	O
and	O
are	O
the	O
reason	O
the	O
Skaarj	O
have	O
invaded	O
.	O
</s>
<s>
Prisoner	O
849	O
is	O
likely	O
the	O
only	O
human	O
alive	O
on	O
the	O
planet	B-Application
Na	I-Application
Pali	I-Application
throughout	O
the	O
game	O
.	O
</s>
<s>
The	O
mothership	O
proves	O
to	O
be	O
a	O
vast	O
labyrinth	B-Application
,	O
but	O
Prisoner	O
849	O
manages	O
to	O
find	O
the	O
ship	O
's	O
reactor	O
and	O
destroys	O
it	O
,	O
plunging	O
the	O
vessel	O
into	O
darkness	O
.	O
</s>
<s>
The	O
expansion	O
,	O
Return	B-Application
to	I-Application
Na	I-Application
Pali	I-Application
,	O
developed	O
by	O
Legend	O
Entertainment	O
,	O
picks	O
up	O
not	O
long	O
after	O
Unreals	B-Application
ending	O
;	O
Prisoner	O
849	O
is	O
found	O
by	O
a	O
human	O
warship	O
,	O
the	O
UMS	O
Bodega	O
Bay	O
.	O
</s>
<s>
The	O
Unified	O
Military	O
Services	O
(	O
UMS	O
)	O
conscripted	O
the	O
prisoner	O
into	O
service	O
upon	O
learning	O
their	O
identity	O
,	O
forcing	O
the	O
prisoner	O
to	O
return	B-Application
to	I-Application
Na	I-Application
Pali	I-Application
in	O
order	O
to	O
locate	O
the	O
downed	O
ship	O
UMS	O
Prometheus	O
.	O
</s>
<s>
Unreal	B-Application
was	O
jointly	O
developed	O
by	O
Epic	O
MegaGames	O
and	O
Digital	O
Extremes	O
and	O
mostly	O
funded	O
with	O
the	O
proceeds	O
from	O
Epic	B-Application
Pinball	I-Application
,	O
Epic	O
's	O
best	O
selling	O
shareware	O
game	O
.	O
</s>
<s>
While	O
the	O
team	O
still	O
had	O
only	O
the	O
outdoor	O
terrain	O
and	O
the	O
dragon	O
in	O
place	O
,	O
Intel	O
invited	O
Epic	O
MegaGames	O
to	O
demonstrate	O
Unreal	B-Application
to	O
them	O
.	O
</s>
<s>
Following	O
the	O
demonstration	O
,	O
Intel	O
told	O
them	O
about	O
their	O
upcoming	O
MMX	B-Architecture
instruction	O
set	O
.	O
</s>
<s>
Sweeney	O
was	O
immediately	O
excited	O
by	O
the	O
possibilities	O
MMX	B-Architecture
presented	O
,	O
and	O
put	O
together	O
a	O
working	O
MMX	B-Architecture
version	O
of	O
the	O
rendering	O
code	O
before	O
Epic	O
had	O
even	O
received	O
a	O
chip	O
with	O
MMX	B-Architecture
.	O
</s>
<s>
Originally	O
,	O
Unreal	B-Application
was	O
going	O
to	O
feature	O
a	O
large	O
status	O
bar	O
and	O
centered	O
weapons	O
,	O
similar	O
to	O
Doom	B-Application
and	O
Quake	B-Application
.	O
</s>
<s>
A	O
few	O
of	O
these	O
levels	O
reappeared	O
in	O
the	O
Return	B-Application
to	I-Application
Na	I-Application
Pali	I-Application
expansion	O
pack	O
.	O
</s>
<s>
At	O
one	O
point	O
,	O
the	O
rifle	O
could	O
fire	O
three	O
shots	O
at	O
once	O
,	O
which	O
is	O
wrongly	O
stated	O
as	O
the	O
alternate	O
fire	O
in	O
the	O
Unreal	B-Application
manual	O
that	O
comes	O
with	O
Unreal	B-Application
Anthology	O
.	O
</s>
<s>
In	O
late	O
1996	O
GT	O
Interactive	O
secured	O
exclusive	O
global	O
publishing	O
rights	O
to	O
Unreal	B-Application
.	O
</s>
<s>
With	O
the	O
game	O
still	O
in	O
development	O
,	O
Epic	O
MegaGames	O
started	O
work	O
on	O
a	O
port	O
for	O
the	O
Nintendo	B-Device
64DD	I-Device
.	O
</s>
<s>
He	O
added	O
that	O
while	O
a	O
port	O
for	O
the	O
standalone	O
Nintendo	B-Operating_System
64	I-Operating_System
would	O
probably	O
be	O
possible	O
,	O
the	O
limited	O
storage	O
space	O
of	O
the	O
cartridge	O
format	O
would	O
necessitate	O
heavy	O
compromises	O
to	O
the	O
details	O
on	O
the	O
monsters	O
and	O
the	O
number	O
of	O
unique	O
textures	O
.	O
</s>
<s>
A	O
Dreamcast	B-Operating_System
port	O
was	O
also	O
planned	O
,	O
and	O
was	O
in	O
fact	O
demoed	O
for	O
the	O
system	O
's	O
capabilities	O
early	O
on	O
its	O
lifecycle	O
,	O
but	O
was	O
canceled	O
when	O
GT	O
Interactive	O
entered	O
financial	O
struggles	O
(	O
one	O
of	O
the	O
reasons	O
they	O
would	O
be	O
purchased	O
by	O
Infogrames	O
in	O
1999	O
)	O
,	O
and	O
a	O
port	O
of	O
Unreal	B-Operating_System
Tournament	I-Operating_System
would	O
take	O
its	O
place	O
in	O
2001	O
.	O
</s>
<s>
Since	O
Unreal	B-Application
came	O
packaged	O
with	O
its	O
own	O
scripting	O
language	O
called	O
UnrealScript	O
,	O
it	O
soon	O
developed	O
a	O
large	O
community	O
on	O
the	O
Internet	O
which	O
was	O
able	O
to	O
add	O
new	O
mods	O
(	O
short	O
for	O
"	O
modifications	O
"	O
)	O
in	O
order	O
to	O
change	O
or	O
enhance	O
gameplay	O
.	O
</s>
<s>
A	O
map	O
editor	O
and	O
overall	O
complete	O
modification	O
program	O
called	O
UnrealEd	B-Application
also	O
came	O
with	O
the	O
package	O
.	O
</s>
<s>
Unreals	B-Application
method	O
of	O
creating	O
maps	O
differs	O
in	O
major	O
ways	O
from	O
that	O
of	O
Quake	B-Application
.	O
</s>
<s>
The	O
bundled	O
UnrealEd	B-Application
map	O
editor	O
uses	O
the	O
Unreal	B-Operating_System
engine	I-Operating_System
to	O
render	O
scenes	O
exactly	O
as	O
they	O
appear	O
in-game	O
,	O
as	O
opposed	O
to	O
external	O
editors	O
like	O
Worldcraft	B-Application
attempting	O
to	O
recreate	O
it	O
with	O
different	O
methods	O
.	O
</s>
<s>
Whereas	O
Quake	B-Application
maps	O
are	O
compiled	O
from	O
a	O
variety	O
of	O
different	O
components	O
,	O
Unreal	B-Application
maps	O
are	O
inherently	O
editable	O
on	O
the	O
fly	O
.	O
</s>
<s>
The	O
Unreal	B-Operating_System
engine	I-Operating_System
brought	O
a	O
host	O
of	O
graphical	O
improvements	O
.	O
</s>
<s>
Unreals	B-Application
software	O
renderer	O
allowed	O
software	O
features	O
as	O
rich	O
as	O
the	O
hardware	O
renderers	O
of	O
the	O
time	O
,	O
including	O
colored	O
lighting	O
and	O
even	O
a	O
limited	O
form	O
of	O
texture	O
filtering	O
referred	O
to	O
by	O
Sweeney	O
as	O
an	O
ordered	O
"	O
texture	O
coordinate	O
space	O
"	O
dither	O
.	O
</s>
<s>
Early	O
pre-release	O
versions	O
of	O
Unreal	B-Application
were	O
based	O
entirely	O
on	O
software	O
rendering	O
.	O
</s>
<s>
Unreal	B-Application
was	O
one	O
of	O
the	O
first	O
games	O
to	O
utilize	O
detail	O
texturing	O
.	O
</s>
<s>
When	O
the	O
player	O
stands	O
within	O
a	O
small	O
distance	O
from	O
most	O
surfaces	O
,	O
the	O
detail	O
texture	O
will	O
fade	O
in	O
and	O
make	O
the	O
surface	O
appear	O
much	O
more	O
complex	O
(	O
high-resolution	B-Algorithm
)	O
instead	O
of	O
becoming	O
increasingly	O
blurry	O
.	O
</s>
<s>
For	O
many	O
years	O
after	O
Unreals	B-Application
release	O
(	O
and	O
Unreal	B-Operating_System
Tournaments	I-Operating_System
release	O
)	O
,	O
detail	O
texturing	O
only	O
worked	O
well	O
with	O
the	O
S3	O
MeTaL	O
and	O
Glide	B-Operating_System
renderer	O
.	O
</s>
<s>
It	O
was	O
,	O
in	O
fact	O
,	O
disabled	O
in	O
the	O
Direct3D	B-Application
renderer	O
by	O
default	O
(	O
but	O
could	O
be	O
re-enabled	O
in	O
the	O
Unreal.ini	O
file	O
)	O
due	O
to	O
performance	O
and	O
quality	O
issues	O
caused	O
by	O
the	O
driver	O
,	O
while	O
it	O
was	O
present	O
even	O
on	O
hardware	O
many	O
times	O
more	O
powerful	O
than	O
the	O
original	O
S3	B-Device
Savage3D	I-Device
and	O
3Dfx	O
Voodoo	O
Graphics	O
.	O
</s>
<s>
Because	O
of	O
Unreals	B-Application
long	O
development	O
time	O
,	O
the	O
course	O
of	O
development	O
occurred	O
during	O
the	O
emergence	O
and	O
rapid	O
progression	O
of	O
hardware	O
3D	O
accelerators	O
.	O
</s>
<s>
Along	O
with	O
the	O
advanced	O
software	O
3D	O
renderer	O
,	O
Unreal	B-Application
was	O
built	O
to	O
take	O
advantage	O
of	O
the	O
3Dfx	B-Operating_System
Glide	I-Operating_System
API	B-Application
,	O
which	O
emerged	O
as	O
the	O
dominant	O
interface	O
towards	O
the	O
end	O
of	O
the	O
game	O
's	O
development	O
.	O
</s>
<s>
When	O
Unreal	B-Application
was	O
finally	O
released	O
,	O
Microsoft	O
's	O
Direct3D	B-Application
API	B-Application
was	O
growing	O
rapidly	O
in	O
popularity	O
and	O
Epic	O
was	O
fairly	O
quick	O
to	O
develop	O
a	O
renderer	O
for	O
their	O
game	O
engine	O
.	O
</s>
<s>
However	O
,	O
the	O
Direct3D	B-Application
renderer	O
,	O
released	O
initially	O
to	O
support	O
the	O
new	O
Matrox	B-General_Concept
G200	I-General_Concept
,	O
was	O
less	O
capable	O
and	O
slower	O
than	O
the	O
Glide	B-Operating_System
support	O
,	O
especially	O
in	O
the	O
beginning	O
when	O
it	O
was	O
unstable	O
,	O
slow	O
,	O
and	O
had	O
many	O
graphics	O
quality	O
issues	O
.	O
</s>
<s>
Unreal	B-Application
also	O
had	O
official	O
OpenGL	B-Application
support	O
.	O
</s>
<s>
While	O
many	O
game	O
companies	O
went	O
from	O
FM	O
synthesis	O
or	O
General	O
MIDI	O
in	O
the	O
early	O
1990s	O
to	O
enhanced	O
CD	O
audio	O
and	O
pre-rendered	O
audio	O
,	O
many	O
of	O
the	O
Epic	O
Games	O
used	O
the	O
less	O
common	O
system	O
of	O
module	O
music	O
,	O
composed	O
with	O
a	O
tracker	B-Application
,	O
which	O
used	O
stored	O
PCM	B-Algorithm
sound	B-Algorithm
samples	I-Algorithm
of	O
musical	O
instruments	O
sequenced	O
together	O
to	O
produce	O
music	O
.	O
</s>
<s>
Epic	O
had	O
been	O
using	O
this	O
technology	O
for	O
other	O
games	O
such	O
as	O
Jazz	B-Application
Jackrabbit	I-Application
and	O
One	B-Application
Must	I-Application
Fall	I-Application
:	I-Application
2097	I-Application
,	O
which	O
allowed	O
relatively	O
rich	O
music	O
to	O
be	O
stored	O
in	O
files	O
usually	O
smaller	O
than	O
one	O
megabyte	O
.	O
</s>
<s>
This	O
technology	O
allowed	O
easy	O
implementation	O
of	O
dynamic	O
music	O
for	O
mood	O
changes	O
in	O
Unreal	B-Application
.	O
</s>
<s>
The	O
Unreal	B-Application
soundtrack	O
was	O
written	O
by	O
MOD	O
music	O
authors	O
Alexander	O
Brandon	O
and	O
Michiel	O
van	O
den	O
Bos	O
with	O
a	O
few	O
selected	O
tracks	O
by	O
Dan	O
Gardopée	O
and	O
Andrew	O
Sega	O
.	O
</s>
<s>
Unreals	B-Application
music	O
engine	O
also	O
supports	O
CD	O
audio	O
tracks	O
.	O
</s>
<s>
The	O
latest	O
patch	O
iteration	O
,	O
2.27i	O
,	O
released	O
in	O
November	O
2012	O
,	O
features	O
new	O
graphics	O
rendering	O
like	O
DirectX	B-Application
9	I-Application
,	O
updated	O
OpenGL	B-Application
,	O
new	O
sound	O
rendering	O
based	O
on	O
OpenAL	B-Application
and	O
fixes	O
many	O
incompatibilities	O
with	O
modern	O
operating	B-General_Concept
systems	I-General_Concept
and	O
hardware	O
.	O
</s>
<s>
The	O
Mac	B-Device
version	O
was	O
released	O
in	O
parallel	O
with	O
the	O
PC	O
version	O
.	O
</s>
<s>
It	O
supported	O
RAVE	B-Operating_System
hardware	O
acceleration	O
as	O
well	O
as	O
3DFX	O
's	O
Voodoo	O
,	O
built-in	O
software	O
rendering	O
and	O
,	O
later	O
on	O
,	O
OpenGL	B-Application
rendering	O
.	O
</s>
<s>
RAVE	B-Operating_System
acceleration	O
support	O
allowed	O
the	O
game	O
to	O
support	O
hardware	O
3D	O
acceleration	O
with	O
just	O
about	O
every	O
Mac	B-Device
that	O
included	O
it	O
.	O
</s>
<s>
It	O
also	O
supported	O
Apple	O
's	O
Game	B-Operating_System
Sprockets	I-Operating_System
.	O
</s>
<s>
The	O
last	O
update	O
for	O
the	O
Mac	B-Application
OS	I-Application
port	O
was	O
version	O
224b	O
,	O
which	O
breaks	O
network	O
compatibility	O
between	O
it	O
and	O
the	O
PC	O
version	O
,	O
as	O
well	O
as	O
lacking	O
support	O
for	O
some	O
user-created	O
content	O
made	O
for	O
225	O
and	O
226f	O
.	O
</s>
<s>
An	O
unofficial	O
content	O
port	O
of	O
the	O
single-player	O
maps	O
to	O
Linux	B-Application
was	O
created	O
by	O
several	O
users	O
of	O
icculus.org,	O
which	O
allowed	O
the	O
Unreal	B-Application
single-player	O
game	O
content	O
to	O
be	O
run	O
as	O
a	O
modification	O
for	O
Unreal	B-Operating_System
Tournament	I-Operating_System
.	O
</s>
<s>
The	O
online	O
retailer	O
Tux	O
Games	O
at	O
one	O
point	O
sold	O
a	O
box	O
set	O
including	O
the	O
Linux	B-Application
version	O
.	O
</s>
<s>
The	O
227	O
community	O
patch	O
contains	O
a	O
full	O
Linux	B-Application
port	O
for	O
Unreal	B-Application
.	O
</s>
<s>
Two	O
novels	O
titled	O
Hard	O
Crash	O
and	O
Prophet	O
's	O
Power	O
were	O
published	O
,	O
expanding	O
on	O
the	O
premise	O
and	O
story	O
first	O
introduced	O
in	O
Unreal	B-Application
.	O
</s>
<s>
A	O
book	O
called	O
Escape	O
to	O
Na	O
Pali	O
:	O
A	O
Journey	O
to	O
the	O
Unreal	B-Application
was	O
published	O
on	O
June	O
23	O
,	O
2014	O
.	O
</s>
<s>
It	O
is	O
an	O
adventure	O
to	O
the	O
world	O
of	O
Unreal	B-Application
,	O
written	O
by	O
Kaitlin	O
Tremblay	O
and	O
Alan	O
Williamson	O
.	O
</s>
<s>
In	O
the	O
United	O
States	O
,	O
Unreal	B-Application
debuted	O
in	O
third	O
place	O
on	O
PC	O
Data	O
's	O
computer	O
game	O
sales	O
chart	O
for	O
the	O
week	O
ending	O
May	O
23	O
,	O
1998	O
,	O
at	O
an	O
average	O
retail	O
price	O
(	O
ARP	O
)	O
of	O
$50	O
.	O
</s>
<s>
Finishing	O
May	O
as	O
the	O
country	O
's	O
second-highest	O
computer	O
game	O
seller	O
of	O
the	O
month	O
,	O
behind	O
StarCraft	B-Application
,	O
Unreal	B-Application
proceeded	O
to	O
alternate	O
with	O
StarCraft	B-Application
between	O
positions	O
1	O
and	O
2	O
on	O
the	O
weekly	O
charts	O
through	O
the	O
May	O
31	O
–	O
June	O
27	O
period	O
.	O
</s>
<s>
Unreal	B-Application
ultimately	O
held	O
at	O
#2	O
behind	O
StarCraft	B-Application
on	O
the	O
monthly	O
chart	O
for	O
June	O
as	O
a	O
whole	O
,	O
and	O
became	O
the	O
United	O
States	O
 '	O
15th-best-selling	O
computer	O
game	O
of	O
1998	O
's	O
first	O
half	O
.	O
</s>
<s>
Unreal	B-Application
maintained	O
a	O
position	O
in	O
PC	O
Data	O
's	O
weekly	O
top	O
10	O
from	O
June	O
28	O
through	O
August	O
1	O
.	O
</s>
<s>
In	O
early	O
August	O
,	O
GT	O
Interactive	O
reported	O
that	O
global	O
sales	O
of	O
Unreal	B-Application
had	O
topped	O
500,000	O
copies	O
,	O
which	O
contributed	O
to	O
growth	O
at	O
the	O
publisher	O
.	O
</s>
<s>
Ultimately	O
,	O
PC	O
Data	O
declared	O
Unreal	B-Application
the	O
United	O
States	O
 '	O
11th-best-selling	O
computer	O
game	O
during	O
the	O
January	O
–	O
November	O
1998	O
period	O
.	O
</s>
<s>
In	O
the	O
United	O
States	O
,	O
Unreal	B-Application
finished	O
1998	O
as	O
the	O
year	O
's	O
13th-biggest	O
computer	O
game	O
seller	O
,	O
with	O
sales	O
of	O
291,300	O
units	O
and	O
revenues	O
of	O
$10.96	O
million	O
.	O
</s>
<s>
Unreal	B-Application
was	O
very	O
well	O
received	O
upon	O
release	O
.	O
</s>
<s>
Next	O
Generation	O
reviewed	O
the	O
PC	O
version	O
of	O
the	O
game	O
,	O
rating	O
it	O
five	O
stars	O
out	O
of	O
five	O
,	O
and	O
stated	O
that	O
"	O
Unreal	B-Application
is	O
the	O
single	O
best	O
action	O
game	O
ever	O
to	O
appear	O
on	O
PC	O
"	O
.	O
</s>
<s>
In	O
1998	O
,	O
PC	O
Gamer	O
US	O
declared	O
Unreal	B-Application
the	O
13th-best	O
computer	O
game	O
ever	O
released	O
.	O
</s>
