<s>
Team	B-Application
Fortress	I-Application
Classic	I-Application
is	O
a	O
first-person	O
shooter	O
game	O
developed	O
by	O
Valve	O
and	O
published	O
by	O
Sierra	O
Studios	O
.	O
</s>
<s>
It	O
was	O
originally	O
released	O
in	O
April	O
1999	O
for	O
Windows	O
,	O
and	O
is	O
based	O
on	O
Team	B-Application
Fortress	I-Application
,	O
a	O
mod	O
for	O
the	O
1996	O
game	O
Quake	B-Application
.	O
</s>
<s>
The	O
scenarios	O
include	O
capture	B-Application
the	I-Application
flag	I-Application
,	O
territorial	O
control	O
,	O
and	O
escorting	O
a	O
"	O
VIP	O
"	O
player	O
.	O
</s>
<s>
Valve	O
hired	O
the	O
developers	O
of	O
the	O
Team	B-Application
Fortress	I-Application
mod	O
to	O
develop	O
Team	B-Application
Fortress	I-Application
Classic	I-Application
using	O
its	O
GoldSrc	B-Application
engine	I-Application
(	O
used	O
in	O
their	O
1998	O
game	O
Half-Life	B-Application
)	O
to	O
promote	O
the	O
Half-Life	B-Application
software	B-Application
development	I-Application
kit	I-Application
.	O
</s>
<s>
In	O
2007	O
,	O
Valve	O
released	O
a	O
sequel	O
,	O
Team	B-Application
Fortress	I-Application
2	I-Application
,	O
which	O
completely	O
overhauled	O
the	O
tone	O
and	O
artstyle	O
while	O
still	O
preserving	O
much	O
of	O
the	O
core	O
class-based	O
gameplay	O
.	O
</s>
<s>
Matches	O
in	O
Team	B-Application
Fortress	I-Application
Classic	I-Application
feature	O
two	O
teams	O
,	O
one	O
red	O
and	O
one	O
blue	O
,	O
and	O
nine	O
playable	O
character	O
classes	O
.	O
</s>
<s>
In	O
Team	B-Application
Fortress	I-Application
Classic	I-Application
,	O
a	O
server	O
can	O
hold	O
up	O
to	O
32	O
players	O
simultaneously	O
,	O
and	O
matches	O
can	O
be	O
played	O
in	O
a	O
number	O
of	O
game	O
modes	O
,	O
each	O
featuring	O
different	O
objectives	O
.	O
</s>
<s>
In	O
Team	B-Application
Fortress	I-Application
Classic	I-Application
,	O
the	O
player	O
can	O
choose	O
to	O
play	O
as	O
one	O
of	O
nine	O
classes	O
:	O
the	O
Scout	O
,	O
Sniper	O
,	O
Soldier	O
,	O
Demoman	O
,	O
Medic	O
,	O
Heavy	O
Weapons	O
Guy	O
,	O
Pyro	O
,	O
Spy	O
,	O
or	O
Engineer	O
.	O
</s>
<s>
Additionally	O
,	O
each	O
class	O
gets	O
a	O
melee	O
weapon	O
(	O
all	O
classes	O
,	O
with	O
the	O
exception	O
of	O
the	O
Medic	O
,	O
Spy	O
,	O
and	O
Engineer	O
,	O
wield	O
a	O
crowbar	O
,	O
a	O
homage	O
to	O
Valve	O
's	O
game	O
Half-Life	B-Application
)	O
.	O
</s>
<s>
The	B-Application
Sniper	I-Application
class	O
is	O
armed	O
with	O
a	O
high-powered	O
sniper	O
rifle	O
,	O
and	O
can	O
be	O
used	O
to	O
attack	O
enemies	O
from	O
distant	O
positions	O
.	O
</s>
<s>
The	O
Spy	O
is	O
equipped	O
with	O
a	O
knife	O
to	O
kill	O
enemy	O
players	O
in	O
one	O
hit	O
by	O
stabbing	O
them	O
in	O
the	O
back	O
,	O
a	O
tranquilizer	B-Device
gun	I-Device
to	O
slow	O
down	O
opponents	O
and	O
a	O
hallucination	O
grenade	O
which	O
spouts	O
gas	O
to	O
confuse	O
them	O
.	O
</s>
<s>
Team	B-Application
Fortress	I-Application
was	O
originally	O
a	O
modification	O
for	O
Quake	B-Application
(	O
1996	O
)	O
,	O
and	O
then	O
later	O
for	O
QuakeWorld	O
,	O
developed	O
by	O
TF	O
Software	O
Pty	O
.	O
</s>
<s>
Ltd	O
.	O
Its	O
developers	O
were	O
working	O
on	O
a	O
standalone	O
version	O
,	O
Team	B-Application
Fortress	I-Application
2	I-Application
,	O
when	O
they	O
were	O
hired	O
by	O
Valve	O
to	O
write	O
a	O
port	O
of	O
Team	B-Application
Fortress	I-Application
as	O
a	O
mod	O
for	O
Valve	O
's	O
game	O
Half-Life	B-Application
.	O
</s>
<s>
On	O
June	O
9	O
,	O
2000	O
,	O
Team	B-Application
Fortress	I-Application
version	O
1.5	O
was	O
released	O
a	O
part	O
of	O
Half-Life	O
1.1	O
update	O
.	O
</s>
<s>
It	O
was	O
the	O
first	O
standalone	O
version	O
of	O
Team	B-Application
Fortress	I-Application
.	O
</s>
<s>
It	O
also	O
included	O
a	O
new	O
in-game	O
interface	O
and	O
the	O
networking	O
code	O
for	O
Valve	O
's	O
then	O
upcoming	O
Team	B-Application
Fortress	I-Application
2	I-Application
.	O
</s>
<s>
In	O
2003	O
,	O
Team	B-Application
Fortress	I-Application
Classic	I-Application
was	O
released	O
on	O
Valve	O
's	O
Steam	B-Application
system	O
.	O
</s>
<s>
Versions	O
for	O
OS	B-Operating_System
X	I-Operating_System
and	O
Linux	B-Application
were	O
released	O
in	O
2013	O
.	O
</s>
<s>
Team	B-Application
Fortress	I-Application
Classic	I-Application
received	O
positive	O
reviews	O
,	O
garnering	O
a	O
rating	O
of	O
85%	O
on	O
the	O
video	O
game	O
review	B-Application
aggregator	I-Application
site	O
GameRankings	O
.	O
</s>
<s>
There	O
were	O
some	O
criticisms	O
,	O
however	O
,	O
like	O
Graham	O
Smith	O
of	O
Rock	O
,	O
Paper	O
,	O
Shotgun	O
who	O
criticized	O
the	O
game	O
for	O
being	O
"	O
like	O
Counter	B-Application
Strike	I-Application
only	O
messy	O
and	O
gruff	O
"	O
PC	O
Gamer	O
US	O
named	O
Team	B-Application
Fortress	I-Application
Classic	I-Application
the	O
best	O
multiplayer	O
game	O
of	O
1999	O
,	O
and	O
wrote	O
that	O
it	O
was	O
"	O
more	O
fun	O
and	O
more	O
addictive	O
than	O
any	O
other	O
multiplayer-only	O
title	O
released	O
in	O
1999	O
,	O
and	O
did	O
n't	O
cost	O
owners	O
of	O
Half-Life	B-Application
a	O
single	O
penny.	O
"	O
</s>
<s>
Following	O
the	O
success	O
of	O
Team	B-Application
Fortress	I-Application
as	O
a	O
Quake	B-Application
modification	O
,	O
Team	B-Application
Fortress	I-Application
Software	O
began	O
development	O
of	O
a	O
sequel	O
.	O
</s>
<s>
Interested	O
in	O
the	O
project	O
's	O
potential	O
,	O
Valve	O
hired	O
the	O
team	O
to	O
develop	O
Team	B-Application
Fortress	I-Application
2	I-Application
on	O
the	O
modified	O
Quake	B-Application
engine	O
used	O
by	O
Half-Life	B-Application
.	O
</s>
<s>
The	O
partnership	O
was	O
announced	O
in	O
1998	O
,	O
developed	O
in	O
parallel	O
to	O
Team	B-Application
Fortress	I-Application
Classic	I-Application
.	O
</s>
<s>
Introduced	O
as	O
Team	B-Application
Fortress	I-Application
2	I-Application
:	O
Brotherhood	O
of	O
Arms	O
,	O
the	O
game	O
showcased	O
multiple	O
unprecedented	O
technologies	O
for	O
its	O
time	O
and	O
won	O
several	O
awards	O
including	O
"	O
Best	O
Online	O
Game	O
"	O
and	O
"	O
Best	O
Action	O
Game	O
"	O
.	O
</s>
<s>
In	O
June	O
2000	O
,	O
Valve	O
announced	O
that	O
Team	B-Application
Fortress	I-Application
2	I-Application
had	O
been	O
delayed	O
further	O
,	O
attributing	O
this	O
to	O
their	O
rebuilding	O
of	O
the	O
game	O
on	O
a	O
new	O
,	O
proprietary	B-Application
in-house	O
engine	O
that	O
is	O
today	O
known	O
as	O
the	O
Source	B-Application
engine	I-Application
.	O
</s>
<s>
Running	O
up	O
to	O
Half-Life	O
2'''s	O
release	O
in	O
2004	O
,	O
Valve	O
's	O
Doug	O
Lombardi	O
claimed	O
that	O
Team	B-Application
Fortress	I-Application
2	I-Application
was	O
still	O
being	O
developed	O
and	O
news	O
of	O
its	O
release	O
would	O
come	O
after	O
that	O
of	O
Half-Life	B-Application
2	I-Application
.	O
</s>
<s>
In	O
2007	O
,	O
Team	B-Application
Fortress	I-Application
2	I-Application
was	O
released	O
to	O
critical	O
acclaim	O
as	O
part	O
of	O
The	B-Application
Orange	I-Application
Box	I-Application
.	O
</s>
<s>
The	O
plot	O
and	O
characters	O
of	O
Team	B-Application
Fortress	I-Application
2	I-Application
were	O
expanded	O
upon	O
outside	O
of	O
the	O
game	O
in	O
the	O
form	O
of	O
short	O
videos	O
or	O
comics	O
.	O
</s>
<s>
In	O
April	O
2014	O
,	O
the	O
Team	B-Application
Fortress	I-Application
comic	O
series	O
reintroduced	O
the	O
Team	B-Application
Fortress	I-Application
Classic	I-Application
classes	O
(	O
excluding	O
their	O
respective	O
Medic	O
)	O
as	O
a	O
rival	O
cast	O
of	O
characters	O
to	O
the	O
Team	B-Application
Fortress	I-Application
2	I-Application
team	O
.	O
</s>
<s>
A	O
catch-up	O
comic	O
released	O
on	O
the	O
TF2	O
website	O
released	O
for	O
free	O
comic	O
book	O
day	O
described	O
Team	B-Application
Fortress	I-Application
Classic	I-Application
as	O
being	O
set	O
in	O
an	O
alternate	O
1930	O
,	O
and	O
that	O
the	O
game	O
takes	O
place	O
during	O
the	O
Gravel	O
Wars	O
era	O
of	O
the	O
timeline	O
,	O
along	O
with	O
the	O
fact	O
that	O
the	O
Classic	O
engineer	O
is	O
the	O
father	O
of	O
the	O
engineer	O
in	O
Team	B-Application
Fortress	I-Application
2	I-Application
.	O
</s>
<s>
A	O
fan-made	O
total	O
conversion	O
mod	O
for	O
Half-Life	B-Application
2	I-Application
titled	O
Fortress	B-Language
Forever	I-Language
was	O
created	O
,	O
aiming	O
to	O
replicate	O
the	O
gameplay	O
of	O
Team	B-Application
Fortress	I-Application
Classic	I-Application
while	O
using	O
the	O
more	O
modern	O
Source	B-Application
engine	I-Application
.	O
</s>
<s>
Fans	O
have	O
also	O
made	O
a	O
similar	O
mod	O
of	O
Team	B-Application
Fortress	I-Application
2	I-Application
titled	O
Team	B-Application
Fortress	I-Application
2	I-Application
Classic''	O
,	O
which	O
seeks	O
to	O
marry	O
gameplay	O
elements	O
and	O
concepts	O
from	O
both	O
entries	O
alongside	O
scrapped	O
ideas	O
from	O
the	O
sequel	O
's	O
development	O
cycle	O
and	O
several	O
entirely	O
original	O
additions	O
.	O
</s>
