<s>
Thief	B-Application
:	I-Application
The	I-Application
Dark	I-Application
Project	I-Application
is	O
a	O
1998	O
first-person	O
stealth	O
video	O
game	O
developed	O
by	O
Looking	O
Glass	O
Studios	O
and	O
published	O
by	O
Eidos	O
Interactive	O
.	O
</s>
<s>
Set	O
in	O
a	O
fantasy	O
metropolis	O
called	O
the	O
City	O
,	O
players	O
take	O
on	O
the	O
role	O
of	O
Garrett	O
,	O
a	O
master	O
thief	B-Application
trained	O
by	O
a	O
secret	O
society	O
who	O
,	O
while	O
carrying	O
out	O
a	O
series	O
of	O
robberies	O
,	O
becomes	O
embroiled	O
in	O
a	O
complex	O
plot	O
that	O
ultimately	O
sees	O
him	O
attempting	O
to	O
prevent	O
a	O
great	O
power	O
from	O
unleashing	O
chaos	O
on	O
the	O
world	O
.	O
</s>
<s>
Thief	B-Application
was	O
the	O
first	O
PC	O
stealth	O
game	O
to	O
use	O
light	O
and	O
sound	O
as	O
game	O
mechanics	O
,	O
and	O
combined	O
complex	O
artificial	B-Application
intelligence	I-Application
with	O
simulation	O
systems	O
to	O
allow	O
for	O
emergent	O
gameplay	O
.	O
</s>
<s>
The	O
game	O
is	O
notable	O
for	O
its	O
use	O
of	O
first-person	O
perspective	O
for	O
non-confrontational	O
gameplay	O
,	O
which	O
challenged	O
the	O
first-person	O
shooter	O
market	O
and	O
led	O
the	O
developers	O
to	O
call	O
it	O
a	O
"	O
first-person	O
sneaker	O
"	O
,	O
while	O
it	O
also	O
had	O
influences	O
in	O
later	O
stealth	O
games	O
such	O
as	O
Tom	B-Application
Clancy	I-Application
's	I-Application
Splinter	I-Application
Cell	I-Application
and	O
Hitman	B-Application
.	O
</s>
<s>
Thief	B-Application
was	O
followed	O
by	O
an	O
expanded	O
edition	O
entitled	O
Thief	B-Application
Gold	I-Application
(	O
1999	O
)	O
which	O
modified	O
certain	O
missions	O
and	O
included	O
a	O
few	O
brand	O
new	O
levels	O
,	O
two	O
sequels	O
:	O
Thief	B-Application
II	I-Application
:	I-Application
The	I-Application
Metal	I-Application
Age	I-Application
(	O
2000	O
)	O
,	O
and	O
Thief	B-Application
:	I-Application
Deadly	I-Application
Shadows	I-Application
(	O
2004	O
)	O
,	O
as	O
well	O
as	O
a	O
reboot	O
of	O
the	O
series	O
,	O
Thief	B-Application
(	O
2014	O
)	O
.	O
</s>
<s>
Thief	B-Application
was	O
one	O
of	O
two	O
games	O
in	O
the	O
series	O
that	O
Looking	O
Glass	O
worked	O
on	O
before	O
it	O
was	O
forced	O
to	O
close	O
.	O
</s>
<s>
Thief	B-Application
takes	O
place	O
from	O
a	O
first-person	O
perspective	O
in	O
a	O
3D	O
environment	O
,	O
with	O
the	O
game	O
's	O
story	O
taking	O
place	O
over	O
a	O
series	O
of	O
missions	O
,	O
in	O
which	O
the	O
player	O
character	O
is	O
able	O
to	O
perform	O
various	O
actions	O
such	O
as	O
leaning	O
,	O
crouching	O
,	O
swimming	O
,	O
climbing	O
,	O
running	O
and	O
fighting	O
,	O
amongst	O
other	O
abilities	O
.	O
</s>
<s>
The	O
game	O
's	O
NPCs	O
feature	O
artificial	B-Application
intelligence	I-Application
(	O
AI	B-Application
)	O
systems	O
that	O
detect	O
unscripted	O
visual	O
and	O
aural	O
cues	O
.	O
</s>
<s>
Thief	B-Application
takes	O
place	O
in	O
a	O
metropolis	O
called	O
"	O
the	O
City	O
"	O
,	O
which	O
has	O
been	O
noted	O
to	O
contain	O
elements	O
of	O
the	O
Middle	O
Ages-like	O
dark	O
fantasy	O
and	O
the	O
Industrial	O
Revolution	O
.	O
</s>
<s>
Project	O
director	O
Greg	O
LoPiccolo	O
said	O
in	O
an	O
early	O
preview	O
:	O
"	O
In	O
essence	O
[	O
...	O
it's ]	O
this	O
undefined	O
medieval	O
age	O
,	O
sort	O
of	O
medieval	O
 [ Europe ] 	O
meets	O
Brazil	O
meets	O
City	B-Application
of	I-Application
Lost	I-Application
Children	I-Application
.	O
</s>
<s>
It	O
has	O
also	O
been	O
argued	O
that	O
Thief	B-Application
is	O
one	O
of	O
the	O
earliest	O
examples	O
of	O
the	O
New	O
Weird	O
genre	O
.	O
</s>
<s>
During	O
levels	O
,	O
the	O
player	O
may	O
learn	O
about	O
the	O
setting	O
by	O
finding	O
notes	O
and	O
overhearing	O
conversations	O
;	O
it	O
has	O
been	O
noted	O
that	O
the	O
player	O
participates	O
in	O
the	O
revelation	O
of	O
Thiefs	B-Application
setting	O
.	O
</s>
<s>
Years	O
later	O
,	O
Garrett	O
works	O
as	O
a	O
thief	B-Application
,	O
and	O
is	O
under	O
pressure	O
to	O
join	O
a	O
crime	O
ring	O
.	O
</s>
<s>
He	O
learns	O
that	O
there	O
are	O
four	O
talismans	O
needed	O
to	O
remove	O
the	O
seal	O
:	O
two	O
hidden	O
in	O
ancient	O
ruins	O
beneath	O
the	O
City	O
,	O
and	O
two	O
inside	O
a	O
Hammerite	O
temple	O
(	O
in	O
Thief	B-Application
Gold	I-Application
,	O
one	O
talisman	O
is	O
in	O
possession	O
of	O
the	O
mages	O
and	O
another	O
was	O
found	O
at	O
an	O
opera	O
house	O
after	O
it	O
was	O
taken	O
from	O
the	O
caves	O
below	O
,	O
while	O
the	O
other	O
two	O
are	O
in	O
the	O
Lost	O
City	O
and	O
the	O
Hammerite	O
Temple	O
as	O
in	O
the	O
original	O
game	O
)	O
.	O
</s>
<s>
Garrett	O
dismisses	O
him	O
,	O
and	O
as	O
he	O
walks	O
away	O
,	O
Artemus	O
warns	O
of	O
the	O
encroaching	O
"	O
metal	B-Application
age	I-Application
"	O
.	O
</s>
<s>
Thief	B-Application
began	O
development	O
in	O
April	O
1996	O
.	O
</s>
<s>
For	O
the	O
game	O
's	O
original	O
designer	O
and	O
writer	O
Ken	O
Levine	O
,	O
credited	O
by	O
The	O
Telegraph	O
as	O
"	O
a	O
key	O
figure	O
in	O
the	O
creation	O
"	O
of	O
Thief	B-Application
,	O
Lewis	O
Denby	O
,	O
BioShock	O
Infinite	O
interview	O
-	O
Ken	O
Levine	O
,	O
Telegraph	O
,	O
03	O
Nov	O
2011	O
inspirations	O
came	O
from	O
two	O
of	O
his	O
favourite	O
games	O
,	O
Castle	B-Application
Wolfenstein	I-Application
and	O
Diablo.Dan	O
Ryckert	O
,	O
Things	O
You	O
Did	O
n't	O
Know	O
About	O
Ken	O
Levine	O
,	O
GameInformer.com,	O
May	O
30	O
,	O
2012	O
The	O
initial	O
concept	O
was	O
to	O
make	O
an	O
action	B-Application
role-playing	I-Application
game	I-Application
and	O
Levine	O
was	O
given	O
the	O
job	O
of	O
designing	O
the	O
game	O
's	O
world	O
and	O
story	O
.	O
</s>
<s>
Levine	O
said	O
the	O
initial	O
ideas	O
and	O
projects	O
that	O
have	O
later	O
morphed	O
into	O
Dark	O
Camelot	B-Application
,	O
before	O
eventually	O
evolving	O
into	O
The	O
Dark	O
Project	O
,	O
included	O
School	O
of	O
Wizards	O
,	O
Dark	O
Elves	O
Must	O
Die	O
and	O
Better	O
Red	O
Than	O
Undead	O
,	O
the	O
latter	O
of	O
which	O
was	O
"	O
a	O
campy	O
story	O
"	O
about	O
communist	O
zombies	O
.	O
</s>
<s>
According	O
to	O
programmer	O
Marc	O
LeBlanc	O
,	O
"	O
The	O
first	O
proposal	O
was	O
Better	O
Red	O
Than	O
Undead	O
,	O
a	O
'	O
50s	O
Cold	B-Application
War	I-Application
game	O
where	O
the	O
Soviet	O
Union	O
is	O
overrun	O
with	O
zombies	O
and	O
you	O
have	O
to	O
go	O
hack	O
them	O
to	O
pieces	O
as	O
the	O
loner	O
from	O
the	O
CIA	O
because	O
bullets	O
do	O
n't	O
work	O
on	O
the	O
undead.	O
"	O
</s>
<s>
The	O
next	O
concept	O
,	O
Dark	O
Camelot	B-Application
,	O
still	O
focused	O
on	O
sword	O
combat	O
.	O
</s>
<s>
Its	O
plot	O
—	O
an	O
inversion	O
of	O
Arthurian	O
legend	O
—	O
featured	O
Mordred	O
as	O
a	O
misunderstood	O
hero	O
,	O
King	B-Application
Arthur	I-Application
as	O
a	O
tyrannical	O
villain	O
and	O
Merlin	B-Device
as	O
a	O
psychopath	O
.	O
</s>
<s>
According	O
to	O
Church	O
,	O
the	O
game	O
featured	O
Morgan	O
le	O
Fay	O
as	O
Mordred	O
's	O
"	O
sort	O
of	O
good	O
"	O
advisor	O
and	O
Guinevere	O
as	O
a	O
lesbian	O
who	O
would	O
betray	O
Lancelot	B-Application
and	O
help	O
Mordred	O
to	O
break	O
into	O
Camelot	B-Application
and	O
steal	O
the	O
Holy	B-General_Concept
Grail	I-General_Concept
.	O
</s>
<s>
The	O
game	O
's	O
design	O
combined	O
a	O
first-person	O
perspective	O
with	O
action	B-Application
,	O
role-playing	O
and	O
adventure	O
elements	O
.	O
</s>
<s>
Warren	O
Spector	O
,	O
who	O
had	O
recently	O
left	O
Origin	O
Systems	O
to	O
found	O
Looking	O
Glass	O
Studios	O
Austin	O
,	O
became	O
Dark	O
Camelots	B-Application
producer	O
after	O
his	O
predecessor	O
departed	O
.	O
</s>
<s>
Artist	O
Dan	O
Thron	O
said	O
:	O
"	O
For	O
a	O
good	O
long	O
time	O
,	O
we	O
had	O
no	O
idea	O
what	O
the	O
game	O
was	O
about	O
,	O
until	O
somebody	O
stumbled	O
upon	O
the	O
whole	O
thief	B-Application
game	O
play	O
where	O
you	O
're	O
not	O
just	O
running	O
out	O
trying	O
to	O
chop	O
people	O
up	O
.	O
</s>
<s>
So	O
Paul	O
 [ Nerath ] 	O
had	O
been	O
pushing	O
for	O
a	O
while	O
that	O
the	O
thief	B-Application
side	O
of	O
it	O
was	O
the	O
really	O
interesting	O
part	O
and	O
why	O
not	O
you	O
just	O
do	O
a	O
thief	B-Application
game.	O
"	O
</s>
<s>
A	O
previously	O
unreleased	O
trailer	O
for	O
Dark	O
Camelot	B-Application
and	O
its	O
Stargate	O
Engine	O
was	O
uploaded	O
to	O
YouTube	B-General_Concept
in	O
2013.Craig	O
Pearson	O
,	O
Pre-Thief	O
:	O
Dark	O
Camelot	B-Application
Footage	O
,	O
Rock	O
,	O
Paper	O
,	O
Shotgun	O
,	O
May	O
17th	O
,	O
2013	O
.	O
</s>
<s>
In	O
early	O
1997	O
,	O
Dark	O
Camelots	B-Application
name	O
was	O
tentatively	O
changed	O
to	O
The	O
Dark	O
Project	O
and	O
its	O
design	O
altered	O
to	O
focus	O
on	O
thievery	O
and	O
stealth	O
.	O
</s>
<s>
Nevertheless	O
,	O
some	O
levels	O
originally	O
designed	O
for	O
Dark	O
Camelot	B-Application
ended	O
up	O
in	O
the	O
final	O
product	O
.	O
</s>
<s>
Levine	O
said	O
inspiration	O
for	O
the	O
idea	O
of	O
being	O
powerful	O
when	O
undetected	O
but	O
very	O
vulnerable	O
when	O
exposed	O
came	O
from	O
the	O
concept	O
of	O
submarine	O
warfare	O
and	O
in	O
particular	O
from	O
the	O
1985	O
simulation	O
video	O
game	O
Silent	B-Device
Service	I-Device
.	O
</s>
<s>
The	O
company	O
's	O
Austin	O
branch	O
closed	O
,	O
costing	O
Spector	O
and	O
several	O
game	O
engine	O
programmers	O
;	O
this	O
team	O
relocated	O
to	O
Ion	O
Storm	O
,	O
and	O
released	O
Deus	B-Application
Ex	I-Application
in	O
2000	O
.	O
</s>
<s>
Spector	O
later	O
called	O
his	O
impact	O
on	O
Thief	B-Application
,	O
"	O
at	O
best	O
,	O
minimal	O
"	O
.	O
</s>
<s>
This	O
stress	O
caused	O
several	O
team	O
members	O
to	O
voluntarily	O
quit	O
,	O
including	O
the	O
lead	O
programmer	O
,	O
Briscoe	O
Rogers	O
,	O
who	O
had	O
designed	O
the	O
game	O
's	O
AI	B-Application
system	O
,	O
which	O
suffered	O
from	O
software	B-Error_Name
bugs	I-Error_Name
and	O
problems	O
with	O
complexity	O
.	O
</s>
<s>
When	O
Leonard	O
took	O
over	O
the	O
position	O
of	O
lead	O
programmer	O
,	O
he	O
believed	O
that	O
the	O
AI	B-Application
system	O
was	O
fixable	O
;	O
over	O
several	O
months	O
,	O
he	O
learned	O
that	O
the	O
pathfinding	B-Algorithm
database	O
—	O
code	O
that	O
helps	O
AI	B-Application
navigate	O
a	O
map	O
—	O
was	O
unsalvageable	O
.	O
</s>
<s>
He	O
believed	O
that	O
the	O
removal	O
of	O
multiplayer	O
support	O
and	O
the	O
game	O
's	O
renaming	O
—	O
from	O
The	O
Dark	O
Project	O
to	O
Thief	B-Application
:	I-Application
The	I-Application
Dark	I-Application
Project	I-Application
—	O
solidified	O
this	O
in	O
the	O
minds	O
of	O
the	O
team	O
.	O
</s>
<s>
The	O
game	O
was	O
renamed	O
on	O
April	O
3	O
,	O
1998	O
,	O
the	O
new	O
title	O
being	O
much	O
more	O
descriptive	O
and	O
inspired	O
by	O
that	O
of	O
the	O
role-playing	O
game	O
Vampire	B-Application
:	I-Application
The	I-Application
Masquerade	I-Application
.	O
</s>
<s>
Several	O
features	O
have	O
been	O
brainstormed	O
and	O
rejected	O
,	O
including	O
"	O
Spider-Man-esque	O
"	O
ability	O
to	O
climb	O
on	O
walls	O
and	O
ceilings	O
and	O
the	O
shrinking	O
and	O
invisibility	O
potions	O
.	O
</s>
<s>
By	O
summer	O
1998	O
,	O
the	O
team	O
was	O
challenged	O
by	O
exhaustion	O
and	O
the	O
game	O
's	O
numerous	O
simulation	O
and	O
AI	B-Application
glitches	O
.	O
</s>
<s>
Implementation	O
of	O
Leonard	O
's	O
new	O
AI	B-Application
system	O
was	O
halted	O
so	O
the	O
team	O
could	O
quickly	O
assemble	O
proof-of-concept	O
demos	O
;	O
publisher	O
Eidos	O
Interactive	O
had	O
grown	O
skeptical	O
over	O
the	O
team	O
's	O
vision	O
.	O
</s>
<s>
Work	O
on	O
the	O
AI	B-Application
did	O
not	O
resume	O
until	O
March	O
1998	O
,	O
and	O
after	O
12	O
more	O
weeks	O
of	O
constant	O
work	O
,	O
it	O
was	O
ready	O
for	O
what	O
Leonard	O
called	O
,	O
"	O
real	O
testing	O
"	O
.	O
</s>
<s>
The	O
team	O
began	O
to	O
believe	O
,	O
as	O
Leonard	O
described	O
,	O
that	O
Thief	B-Application
"	O
did	O
not	O
stink	O
,	O
 [ and ] 	O
might	O
actually	O
be	O
fun.	O
"	O
</s>
<s>
Further	O
,	O
the	O
release	O
of	O
games	O
like	O
Commandos	B-Application
:	I-Application
Behind	I-Application
Enemy	I-Application
Lines	I-Application
,	O
Half-Life	B-Application
and	O
Metal	B-Application
Gear	I-Application
Solid	I-Application
eased	O
worries	O
that	O
experimental	O
gameplay	O
styles	O
were	O
unmarketable	O
.	O
</s>
<s>
The	O
design	O
of	O
Thief	B-Application
focused	O
on	O
stealth	O
and	O
evasion	O
from	O
a	O
first-person	O
perspective	O
.	O
</s>
<s>
In	O
response	O
to	O
the	O
sentiment	O
that	O
their	O
previous	O
games	O
"[required]	O
a	O
fair	O
amount	O
of	O
investment	O
from	O
the	O
player	O
to	O
get	O
maximal	O
enjoyment	O
"	O
,	O
the	O
team	O
specifically	O
designed	O
Thief	B-Application
to	O
allow	O
players	O
to	O
"	O
pick	O
 [ it ] 	O
up	O
and	O
start	O
playing	O
"	O
.	O
</s>
<s>
Thief	B-Application
was	O
designed	O
to	O
be	O
largely	O
unscripted	O
;	O
events	O
,	O
instead	O
of	O
being	O
pre-defined	O
by	O
designers	O
,	O
occur	O
naturally	O
.	O
</s>
<s>
According	O
to	O
Leonard	O
,	O
Thief'''s	O
central	O
gameplay	O
mechanic	O
was	O
the	O
player	O
's	O
relationship	O
with	O
NPCs	O
,	O
who	O
are	O
the	O
primary	O
obstacle	O
in	O
the	O
game	O
.	O
</s>
<s>
The	O
game	O
's	O
goal	O
of	O
emergent	O
events	O
required	O
a	O
sophisticated	O
AI	B-Application
system	O
.	O
</s>
<s>
Leonard	O
later	O
demonstrated	O
that	O
first-person	O
shooters	O
,	O
like	O
Half-Life	B-Application
,	O
often	O
utilize	O
"	O
look	O
and	O
listen	O
"	O
AI	B-Application
systems	O
,	O
wherein	O
NPCs	O
become	O
aggressive	O
when	O
the	O
player	O
is	O
seen	O
or	O
heard	O
.	O
</s>
<s>
He	O
explained	O
that	O
the	O
Thief	B-Application
system	O
defined	O
a	O
broader	O
range	O
of	O
"	O
internal	O
states	O
"	O
an	O
NPC	O
could	O
feel	O
,	O
such	O
as	O
suspicion	O
.	O
</s>
<s>
Designer	O
Randy	O
Smith	O
said	O
:	O
"	O
In	O
Thief	B-Application
the	O
safe	O
boundary	O
is	O
often	O
between	O
light	O
and	O
shadow	O
[	O
...	O
but ]	O
these	O
boundaries	O
are	O
 [ ... ] 	O
not	O
stable	O
or	O
secure[ 	O
...	O
</s>
<s>
The	O
game	O
's	O
missions	O
were	O
designed	O
to	O
suit	O
the	O
story	O
,	O
rather	O
than	O
the	O
story	O
to	O
fit	O
the	O
missions.The	O
Making	O
of	O
Thief	B-Application
II	I-Application
featurette	O
.	O
</s>
<s>
Thief	B-Application
Gold	I-Application
.	O
</s>
<s>
Taking	O
inspiration	O
from	O
GoldenEye	B-Application
007	I-Application
,	O
the	O
team	O
added	O
a	O
difficulty	O
system	O
that	O
changes	O
mission	O
objectives	O
;	O
Leonard	O
said	O
"	O
it	O
allowed	O
the	O
designers	O
to	O
create	O
a	O
very	O
different	O
experience	O
at	O
each	O
level	O
of	O
difficulty	O
,	O
without	O
changing	O
the	O
overall	O
geometry	O
and	O
structure	O
of	O
a	O
mission	O
.	O
</s>
<s>
Project	O
director	O
Greg	O
LoPiccolo	O
wanted	O
Thiefs	B-Application
audio	O
to	O
both	O
enrich	O
the	O
environment	O
and	O
enhance	O
gameplay	O
,	O
and	O
the	O
game	O
's	O
design	O
necessitated	O
an	O
advanced	O
sound	O
system	O
.	O
</s>
<s>
The	O
engine	O
features	O
alpha	B-Algorithm
blending	I-Algorithm
,	O
texture	O
filtering	O
and	O
lighting	O
techniques	O
.	O
</s>
<s>
Motion	B-Application
capture	I-Application
technology	O
was	O
integrated	O
to	O
allow	O
for	O
realistic	O
character	O
animation	O
.	O
</s>
<s>
An	O
unfinished	O
build	O
of	O
the	O
Dark	O
Engine	O
was	O
used	O
to	O
develop	O
System	B-Application
Shock	I-Application
2	I-Application
,	O
a	O
collaboration	O
between	O
Looking	O
Glass	O
and	O
Irrational	O
Games	O
.	O
</s>
<s>
The	O
object	O
system	O
worked	O
so	O
well	O
that	O
Thief	B-Application
and	O
System	B-Application
Shock	I-Application
2	I-Application
used	O
the	O
same	O
executable	B-Application
for	O
most	O
of	O
their	O
development	O
.	O
</s>
<s>
An	O
expanded	O
edition	O
of	O
the	O
game	O
,	O
Thief	B-Application
Gold	I-Application
,	O
was	O
released	O
by	O
Looking	O
Glass	O
and	O
Eidos	O
on	O
October	O
29	O
,	O
1999	O
.	O
</s>
<s>
Its	O
disc	O
also	O
contains	O
a	O
level	B-Application
editor	I-Application
and	O
a	O
"	O
making	O
of	O
Thief	B-Application
II	I-Application
:	I-Application
The	I-Application
Metal	I-Application
Age	I-Application
"	O
video	O
,	O
among	O
other	O
extras	O
.	O
</s>
<s>
Lance	O
A	O
.	O
Larka	O
of	O
Computer	O
Gaming	O
World	O
wrote	O
:	O
"	O
If	O
you	O
're	O
tired	O
of	O
Doom	B-Application
clones	O
and	O
hungry	O
for	O
challenge	O
,	O
give	O
this	O
fresh	O
perspective	O
game	O
a	O
try	O
.	O
</s>
<s>
Kieron	O
Gillen	O
of	O
PC	O
Gamer	O
UK	O
wrote	O
:	O
"	O
The	O
freedom	O
Thief	B-Application
offers	O
you	O
is	O
at	O
first	O
terrifying	O
,	O
then	O
absolutely	O
intoxicating.	O
"	O
</s>
<s>
T	O
.	O
Liam	O
McDonald	O
of	O
PC	O
Gamer	O
US	O
called	O
Thief	B-Application
,	O
"	O
a	O
challenging	O
,	O
riveting	O
game	O
that	O
defies	O
easy	O
categorization	O
"	O
,	O
and	O
praised	O
the	O
game	O
for	O
its	O
focus	O
on	O
the	O
player	O
's	O
cunning	O
.	O
</s>
<s>
Jason	O
Cross	O
of	O
Computer	O
Games	O
Strategy	O
Plus	O
noted	O
that	O
"	O
It	O
's	O
quite	O
amazing	O
how	O
much	O
fun	O
it	O
can	O
be	O
to	O
avoid	O
action	B-Application
"	O
.	O
</s>
<s>
Peter	O
Olafson	O
of	O
GamePro	O
praised	O
the	O
game	O
's	O
AI	B-Application
,	O
and	O
said	O
that	O
the	O
game	O
"	O
gets	O
better	O
...	O
the	O
more	O
time	O
you	O
spend	O
with	O
it	O
"	O
.	O
</s>
<s>
In	O
a	O
retrospective	O
review	O
,	O
AllGame	O
editor	O
Peter	O
Suciu	O
praised	O
the	O
game	O
,	O
touting	O
that	O
"	O
(	O
the	O
game	O
's	O
)	O
first	O
rate	O
storyline	O
as	O
well	O
as	O
visual	O
and	O
audio	O
effects	O
make	O
Thief	B-Application
quite	O
an	O
immersive	O
gaming	O
experience	O
"	O
.	O
</s>
<s>
Wagner	O
James	O
Au	O
of	O
Salon.com	O
noted	O
that	O
the	O
game	O
's	O
level	O
of	O
suspense	O
was	O
"	O
exquisite	O
"	O
and	O
that	O
its	O
use	O
of	O
detailed	O
aural	O
cues	O
as	O
a	O
gameplay	O
device	O
bordered	O
on	O
virtual	O
reality.Thief	O
'	O
s	O
graphics	O
received	O
a	O
mixed	O
reaction	O
,	O
with	O
several	O
negative	O
comparisons	O
to	O
Half-Life	B-Application
and	O
Unreal	B-Application
.	O
</s>
<s>
However	O
,	O
Andrew	O
Sanchez	O
of	O
Maximum	O
PC	O
praised	O
the	O
game	O
's	O
graphics	O
and	O
noted	O
that	O
the	O
Dark	O
Engine	O
went	O
"	O
feature-for-feature	O
with	O
the	O
LithTech	B-Application
,	O
Quake	B-Application
,	O
and	O
Unreal	B-Operating_System
engines	I-Operating_System
"	O
.	O
</s>
<s>
He	O
also	O
praised	O
the	O
game	O
's	O
AI	B-Application
,	O
sound	O
and	O
plot	O
.	O
</s>
<s>
Presley	O
believed	O
that	O
the	O
game	O
's	O
undead	O
enemies	O
caused	O
the	O
game	O
to	O
"	O
degenerate	O
into	O
the	O
standard	O
hack	O
'	O
n	O
 '	O
slash	O
,	O
sub-Conan	O
sort	O
of	O
thing	O
that	O
Heretic	B-Application
,	O
Hexen	B-Application
and	O
a	O
million	O
others	O
gave	O
us	O
,	O
"	O
and	O
that	O
"	O
it	O
amounts	O
to	O
 [ ... ] 	O
an	O
erosion	O
of	O
the	O
storytelling	O
skills	O
that	O
Looking	O
Glass	O
once	O
had.	O
"	O
</s>
<s>
Gillen	O
decried	O
certain	O
levels	O
for	O
"infring[ing]	O
on	O
Tomb	B-Application
Raider	I-Application
territory	O
,	O
and	O
then	O
 [ not ] 	O
quite	O
pull[ing]	O
it	O
off	O
"	O
.	O
</s>
<s>
Next	O
Generation	O
noted	O
that	O
while	O
"	O
sneaking	O
can	O
get	O
repetitive	O
"	O
,	O
Thief	B-Application
is	O
"	O
still	O
a	O
fun	O
game	O
to	O
play	O
"	O
and	O
"	O
a	O
worthy	O
addition	O
to	O
the	O
genre.	O
"	O
</s>
<s>
In	O
the	O
United	O
States	O
,	O
Thief	B-Application
:	I-Application
The	I-Application
Dark	I-Application
Project	I-Application
sold	O
88,101	O
units	O
during	O
1999	O
.	O
</s>
<s>
LegacyThief	O
was	O
the	O
first	O
3D	O
stealth	O
game	O
for	O
a	O
personal	B-Device
computer	I-Device
,	O
and	O
its	O
stealth	O
gameplay	O
innovations	O
influenced	O
later	O
games	O
in	O
the	O
genre	O
.	O
</s>
<s>
Thief	B-Application
's	O
influence	O
has	O
been	O
recognized	O
in	O
other	O
stealth	O
games	O
,	O
such	O
as	O
Assassin	B-Application
's	I-Application
Creed	I-Application
,	O
Hitman	B-Application
,	O
Splinter	O
Cell	O
,	O
and	O
Tenchu	B-Application
.	O
</s>
<s>
Marc	O
Laidlaw	O
,	O
writer	O
and	O
designer	O
on	O
Half-Life	B-Application
,	O
said	O
that	O
"	O
Thief	B-Application
is	O
the	O
single	O
most	O
terrifying	O
,	O
immersive	O
,	O
and	O
rewarding	O
game	O
I	O
have	O
played	O
and	O
the	O
one	O
single-player	O
game	O
I	O
continue	O
to	O
replay	O
.	O
</s>
<s>
 [ ... ] 	O
There	O
are	O
countless	O
books	O
I	O
wish	O
I	O
had	O
written	O
;	O
Thief	B-Application
is	O
one	O
of	O
the	O
few	O
games	O
I	O
wish	O
I	O
had	O
worked	O
on.	O
"	O
</s>
<s>
Laidlaw	O
called	O
Thief	B-Application
his	O
favorite	O
game	O
,	O
an	O
opinion	O
shared	O
by	O
Fallout	B-Application
3	I-Application
lead	O
designer	O
Emil	O
Pagliarulo	O
,	O
and	O
Michel	O
Sabbagh	O
of	O
Bethesda	O
Softworks.Thief	O
:	O
The	O
Dark	O
Project	O
has	O
been	O
declared	O
one	O
of	O
the	O
greatest	O
games	O
of	O
all	O
time	O
by	O
several	O
publications	O
.	O
</s>
<s>
Inducting	O
it	O
into	O
its	O
hall	O
of	O
fame	O
,	O
GameSpy	O
writer	O
Rich	O
Carlson	O
wrote	O
:	O
"	O
With	O
a	O
tactical	O
philosophy	O
contrary	O
to	O
nearly	O
every	O
[	O
first-person	O
shooter ]	O
action	B-Application
game	I-Application
at	O
that	O
time	O
,	O
Thief	B-Application
rewarded	O
stealth	O
and	O
sneaking	O
over	O
brazen	O
frontal	O
assault	O
,	O
"	O
continuing	O
:	O
"	O
While	O
inadvertently	O
undermining	O
the	O
notion	O
that	O
all	O
action	B-Application
games	I-Application
need	O
be	O
shooters	O
,	O
it	O
carved	O
a	O
completely	O
new	O
niche	O
in	O
the	O
same	O
already	O
glutted	O
genre.	O
"	O
</s>
<s>
GameSpot	O
editor	O
Greg	O
Kasavin	O
argued	O
that	O
,	O
while	O
Metal	B-Application
Gear	I-Application
Solid	I-Application
,	O
Tenchu	B-Application
:	I-Application
Stealth	I-Application
Assassins	I-Application
and	O
Thief	B-Application
all	O
defined	O
the	O
stealth	O
action	B-Application
genre	O
,	O
it	O
was	O
Thief	B-Application
that	O
displayed	O
"	O
the	O
purest	O
depiction	O
of	O
what	O
it	O
might	O
be	O
like	O
to	O
slip	O
from	O
shadow	O
to	O
shadow	O
"	O
and	O
"	O
largely	O
remains	O
an	O
unsurpassed	O
achievement	O
in	O
gaming.	O
"	O
</s>
<s>
In	O
2009	O
,	O
Thief	B-Application
was	O
added	O
to	O
IGN	O
's	O
hall	O
of	O
fame	O
.	O
</s>
<s>
Sid	O
Shuman	O
,	O
writing	O
for	O
GamePro	O
,	O
asserted	O
that	O
Thief	B-Application
"	O
pioneered	O
its	O
own	O
genre	O
...	O
the	O
stealth-action	O
title.	O
"	O
</s>
<s>
John	O
Walker	O
of	O
Eurogamer	O
wrote	O
in	O
a	O
retrospective	O
review	O
:	O
"	O
Thief	B-Application
is	O
an	O
embarrassment	O
to	O
modern	O
stealth	O
games	O
,	O
each	O
of	O
which	O
produces	O
only	O
a	O
faded	O
parody	O
of	O
this	O
masterful	O
original.	O
"	O
</s>
<s>
In	O
2012	O
,	O
Mike	O
Fahey	O
of	O
Kotaku	O
called	O
Thief	B-Application
"	O
the	O
best	O
stealth	O
game	O
I	O
've	O
ever	O
played	O
"	O
,	O
superior	O
to	O
modern	O
games	O
in	O
the	O
genre	O
.	O
</s>
<s>
Looking	O
Glass	O
Studios	O
developed	O
Thief	B-Application
II	I-Application
:	I-Application
The	I-Application
Metal	I-Application
Age	I-Application
,	O
which	O
received	O
positive	O
reviews	O
when	O
released	O
in	O
March	O
2000	O
.	O
</s>
<s>
Thief	B-Application
:	I-Application
Deadly	I-Application
Shadows	I-Application
,	O
released	O
for	O
both	O
Windows	O
and	O
the	O
Xbox	B-Operating_System
,	O
was	O
developed	O
by	O
Ion	O
Storm	O
due	O
to	O
the	O
2000	O
closure	O
of	O
Looking	O
Glass	O
Studios	O
.	O
</s>
<s>
In	O
May	O
2009	O
,	O
a	O
fourth	O
game	O
,	O
simply	O
titled	O
Thief	B-Application
was	O
revealed	O
to	O
be	O
in	O
development	O
by	O
Eidos	O
Montréal	O
for	O
Windows	O
,	O
PlayStation	B-Operating_System
3	I-Operating_System
and	O
Xbox	B-Operating_System
360	I-Operating_System
.	O
</s>
<s>
After	O
Looking	O
Glass	O
Studios	O
closed	O
its	O
doors	O
,	O
Thief	B-Application
has	O
been	O
supported	O
by	O
community	O
modifications	O
(	O
mods	O
)	O
.	O
</s>
<s>
Standalone	O
fan	B-Application
made	I-Application
remake	O
The	B-Application
Dark	I-Application
Mod	I-Application
aims	O
to	O
recreate	O
the	O
'	O
essence	O
 '	O
of	O
Thief	B-Application
in	O
a	O
modern	O
game	O
engine	O
.	O
</s>
<s>
Originally	O
released	O
in	O
2009	O
as	O
a	O
mod	O
for	O
Doom	B-Application
3	I-Application
,	O
in	O
October	O
2013	O
it	O
was	O
released	O
as	O
an	O
open-source	B-Application
standalone	O
game	O
.	O
</s>
<s>
In	O
December	O
2013	O
,	O
fan	B-Application
made	I-Application
high	O
definition	O
texture	O
mod	O
Thief	B-Application
Gold	I-Application
HD''	O
was	O
released	O
.	O
</s>
