<s>
DEFCON	B-Application
(	O
stylised	O
as	O
DEFCOИ	O
and	O
sometimes	O
subtitled	O
Everybody	O
Dies	O
in	O
the	O
North	O
American	O
version	O
and	O
Global	O
Thermonuclear	O
War	O
in	O
the	O
European	O
version	O
)	O
is	O
a	O
real-time	O
strategy	O
game	O
created	O
by	O
independent	O
British	O
game	O
developer	O
Introversion	O
Software	O
.	O
</s>
<s>
The	O
gameplay	O
is	O
a	O
simulation	O
of	O
a	O
global	O
nuclear	O
war	O
,	O
with	O
the	O
game	O
's	O
screen	O
reminiscent	O
of	O
the	O
"	O
big	O
boards	O
"	O
that	O
visually	O
represented	O
thermonuclear	O
war	O
in	O
films	O
such	O
as	O
Dr.	O
Strangelove	O
,	O
Fail-Safe	O
,	O
and	O
especially	O
WarGames	B-Application
.	O
</s>
<s>
The	O
game	O
has	O
been	O
available	O
by	O
download	O
since	O
September	O
29	O
,	O
2006	O
through	O
Introversion	O
's	O
web	O
store	O
and	O
Steam	B-Application
.	O
</s>
<s>
In	O
the	O
UK	O
it	O
was	O
released	O
for	O
retail	O
on	O
15	O
June	O
2007	O
and	O
for	O
a	O
limited	O
period	O
included	O
the	O
developer	O
's	O
first	O
game	O
Uplink	B-Application
.	O
</s>
<s>
The	O
game	O
offers	O
six	O
territories	O
that	O
may	O
be	O
selected	O
by	O
a	O
player	O
or	O
assigned	O
to	O
an	O
AI	B-Application
opponent	O
.	O
</s>
<s>
DEFCON	B-Application
is	O
a	O
streamlined	O
real-time	O
strategy	O
game	O
,	O
with	O
no	O
unit	O
production	O
(	O
except	O
for	O
automatic	O
fighter	O
regeneration	O
)	O
,	O
resource	O
collection	O
,	O
or	O
technology	O
tree	O
upgrades	O
.	O
</s>
<s>
Gameplay	O
begins	O
at	O
alert	O
level	O
DEFCON	B-Application
5	O
and	O
counts	O
down	O
to	O
DEFCON	B-Application
1	O
(	O
the	O
highest	O
alert	O
level	O
)	O
.	O
</s>
<s>
Once	O
DEFCON	B-Application
1	O
is	O
reached	O
,	O
the	O
game	O
proceeds	O
until	O
a	O
certain	O
percentage	O
(	O
80%	O
by	O
default	O
)	O
of	O
the	O
total	O
number	O
of	O
nuclear	O
missiles	O
available	O
to	O
all	O
players	O
have	O
been	O
launched	O
or	O
destroyed	O
.	O
</s>
<s>
A	O
DEFCON	B-Application
game	I-Application
can	O
host	O
up	O
to	O
six	O
human	O
or	O
AI	B-Application
players	O
.	O
</s>
<s>
DEFCON	B-Application
also	O
features	O
local	O
multiplayer	O
capability	O
,	O
i.e.	O
</s>
<s>
DEFCON	B-Application
received	O
"	O
favourable	O
"	O
reviews	O
according	O
to	O
the	O
review	B-Application
aggregation	I-Application
website	O
Metacritic	O
.	O
</s>
<s>
Edge	O
said	O
DEFCON	B-Application
was	O
"	O
worth	O
it	O
for	O
the	O
presentation	O
alone.	O
"	O
</s>
<s>
Eurogamer	O
commented	O
that	O
it	O
was	O
"	O
the	O
least	O
ambitious	O
of	O
Introversion	O
's	O
games	O
in	O
terms	O
of	O
design	O
,	O
"	O
and	O
"	O
its	O
limitations	O
are	O
ones	O
of	O
the	O
game	O
's	O
basic	O
scope	O
,	O
"	O
while	O
praising	O
DEFCON	B-Application
"	O
as	O
pure	O
and	O
direct	O
a	O
game	O
as	O
its	O
inspiration.	O
"	O
</s>
<s>
The	O
editors	O
of	O
Computer	O
Games	O
Magazine	O
presented	O
DEFCON	B-Application
with	O
their	O
2006	O
"	O
Best	O
Budget	O
Game	O
"	O
award	O
.	O
</s>
<s>
A	O
study	O
by	O
the	O
Concordia	O
University	O
asked	O
participants	O
about	O
nuclear	O
war	O
,	O
including	O
how	O
likely	O
they	O
thought	O
one	O
could	O
happen	O
or	O
if	O
they	O
could	O
survive	O
one	O
,	O
and	O
divided	O
them	O
into	O
two	O
groups	O
:	O
one	O
that	O
played	O
DEFCON	B-Application
and	O
the	O
other	O
that	O
read	O
articles	O
about	O
nuclear	O
weapons	O
.	O
</s>
<s>
After	O
asking	O
the	O
questions	O
again	O
,	O
the	O
study	O
concluded	O
that	O
those	O
who	O
played	O
DEFCON	B-Application
were	O
less	O
likely	O
to	O
believe	O
that	O
they	O
would	O
survive	O
a	O
nuclear	O
war	O
,	O
but	O
also	O
less	O
likely	O
to	O
believe	O
one	O
could	O
happen	O
.	O
</s>
<s>
As	O
of	O
August	O
2021	O
,	O
the	O
biggest	O
DEFCON	B-Application
online	O
gaming	O
community	O
is	O
maintained	O
on	O
the	O
instant	O
messaging	O
platform	O
Discord	O
.	O
</s>
