<s>
Sid	B-Application
Meier	I-Application
's	I-Application
Civilization	I-Application
is	I-Application
a	O
1991	O
turn-based	O
strategy	O
4X	B-Application
video	I-Application
game	I-Application
developed	O
and	O
published	O
by	O
MicroProse	O
.	O
</s>
<s>
The	O
game	O
was	O
originally	O
developed	O
for	O
MS-DOS	B-Application
running	O
on	O
a	O
PC	O
,	O
and	O
it	O
has	O
undergone	O
numerous	O
revisions	O
for	O
various	O
platforms	O
.	O
</s>
<s>
The	O
player	O
's	O
civilization	B-Application
is	I-Application
in	O
competition	O
with	O
other	O
computer-controlled	O
civilizations	O
,	O
with	O
which	O
the	O
player	O
can	O
enter	O
diplomatic	O
relationships	O
that	O
can	O
either	O
end	O
in	O
alliances	O
or	O
lead	O
to	O
war	O
.	O
</s>
<s>
Civilization	O
was	O
designed	O
by	O
Sid	O
Meier	O
and	O
Bruce	O
Shelley	O
following	O
the	O
successes	O
of	O
Silent	B-Device
Service	I-Device
,	O
Sid	B-Application
Meier	I-Application
's	I-Application
Pirates	I-Application
!	I-Application
</s>
<s>
and	O
Railroad	B-Application
Tycoon	I-Application
.	O
</s>
<s>
Civilization	O
has	O
sold	O
1.5	O
million	O
copies	O
since	O
its	O
release	O
and	O
is	O
considered	O
one	O
of	O
the	O
most	O
influential	O
computer	O
games	O
in	O
history	O
due	O
to	O
its	O
establishment	O
of	O
the	O
4X	B-Application
genre	O
.	O
</s>
<s>
Civilization	O
was	O
followed	O
by	O
several	O
sequels	O
starting	O
with	O
Civilization	B-Application
II	I-Application
,	O
with	O
similar	O
or	O
modified	O
scenarios	O
.	O
</s>
<s>
Civilization	B-Application
is	I-Application
a	O
turn-based	O
single-player	O
strategy	B-Application
game	I-Application
.	O
</s>
<s>
The	O
player	O
takes	O
on	O
the	O
role	O
of	O
the	O
ruler	O
of	O
a	O
civilization	O
,	O
starting	O
with	O
one	O
(	O
or	O
occasionally	O
two	O
)	O
settler	O
units	O
,	O
and	O
attempts	O
to	O
build	O
an	O
empire	B-Application
in	O
competition	O
with	O
two	O
to	O
seven	O
other	O
civilizations	O
.	O
</s>
<s>
From	O
time	O
to	O
time	O
the	O
player	O
's	O
towns	O
may	O
be	O
harassed	O
by	O
barbarians	B-Application
,	O
units	O
with	O
no	O
specific	O
nationality	O
and	O
no	O
named	O
leader	O
.	O
</s>
<s>
These	O
threats	O
only	O
come	O
from	O
huts	O
,	O
unclaimed	O
land	O
or	O
sea	O
,	O
so	O
that	O
over	O
time	O
and	O
turns	O
of	O
exploration	O
,	O
there	O
are	O
fewer	O
and	O
fewer	O
places	O
from	O
which	O
barbarians	B-Application
will	O
emanate	O
.	O
</s>
<s>
The	O
Aztecs	B-Application
are	O
both	O
fiercely	O
expansionist	O
and	O
generally	O
extremely	O
wealthy	O
,	O
for	O
example	O
.	O
</s>
<s>
Each	O
civilization	B-Application
is	I-Application
led	O
by	O
a	O
famous	O
historical	O
figure	O
,	O
such	O
as	O
Mahatma	O
Gandhi	O
for	O
India	O
.	O
</s>
<s>
The	O
scope	O
of	O
Civilization	B-Application
is	I-Application
larger	O
than	O
most	O
other	O
games	O
.	O
</s>
<s>
At	O
the	O
start	O
of	O
the	O
game	O
there	O
are	O
no	O
cities	O
anywhere	O
in	O
the	O
world	O
:	O
the	O
player	O
controls	O
one	O
or	O
two	O
settler	O
units	O
,	O
which	O
can	O
be	O
used	O
to	O
found	O
new	O
cities	O
in	O
appropriate	O
sites	O
(	O
and	O
those	O
cities	O
may	O
build	O
other	O
settler	O
units	O
,	O
which	O
can	O
go	O
out	O
and	O
found	O
new	O
cities	O
,	O
thus	O
expanding	O
the	O
empire	B-Application
)	O
.	O
</s>
<s>
At	O
the	O
start	O
,	O
players	O
choose	O
from	O
advances	O
such	O
as	O
pottery	O
,	O
the	O
wheel	O
,	O
and	O
the	O
alphabet	B-Application
to	O
,	O
near	O
the	O
end	O
of	O
the	O
game	O
,	O
nuclear	O
fission	O
and	O
spaceflight	O
.	O
</s>
<s>
Players	O
can	O
gain	O
a	O
large	O
advantage	O
if	O
their	O
civilization	B-Application
is	I-Application
the	O
first	O
to	O
learn	O
a	O
particular	O
technology	O
(	O
the	O
secrets	O
of	O
flight	O
,	O
for	O
example	O
)	O
and	O
put	O
it	O
to	O
use	O
in	O
a	O
military	O
or	O
other	O
context	O
.	O
</s>
<s>
Most	O
advances	O
give	O
access	O
to	O
new	O
units	O
,	O
city	O
improvements	O
or	O
derivative	O
technologies	O
:	O
for	O
example	O
,	O
the	O
chariot	B-Application
unit	O
becomes	O
available	O
after	O
the	O
wheel	O
is	O
developed	O
,	O
and	O
the	O
granary	O
building	O
becomes	O
available	O
to	O
build	O
after	O
pottery	O
is	O
developed	O
.	O
</s>
<s>
The	O
whole	O
system	O
of	O
advancements	O
from	O
beginning	O
to	O
end	O
is	O
called	O
the	O
technology	O
tree	O
,	O
or	O
simply	O
the	O
Tech	O
tree	O
;	O
this	O
concept	O
has	O
been	O
adopted	O
in	O
many	O
other	O
strategy	B-Application
games	I-Application
.	O
</s>
<s>
The	O
game	O
can	O
be	O
won	O
by	O
conquering	O
all	O
other	O
civilizations	O
or	O
by	O
winning	O
the	O
space	O
race	O
by	O
reaching	O
the	O
star	O
system	O
of	O
Alpha	B-Application
Centauri	I-Application
.	O
</s>
<s>
Danielle	O
Bunten	O
Berry	O
planned	O
to	O
start	O
work	O
on	O
the	O
game	O
after	O
completing	O
M.U.L.E.	B-Application
</s>
<s>
in	O
1983	O
,	O
and	O
again	O
in	O
1985	O
,	O
after	O
completing	O
The	B-Application
Seven	I-Application
Cities	I-Application
of	I-Application
Gold	I-Application
at	O
Electronic	O
Arts	O
.	O
</s>
<s>
In	O
1983	O
Bunten	O
and	O
producer	O
Joe	O
Ybarra	O
opted	O
to	O
first	O
do	O
Seven	B-Application
Cities	I-Application
of	I-Application
Gold	I-Application
.	O
</s>
<s>
The	O
success	O
of	O
Seven	O
Cities	O
in	O
1985	O
in	O
turn	O
led	O
to	O
a	O
sequel	O
,	O
Heart	B-Device
of	I-Device
Africa	I-Device
.	O
</s>
<s>
Don	O
Daglow	O
,	O
designer	O
of	O
Utopia	B-Application
,	O
the	O
first	O
simulation	O
game	O
,	O
began	O
work	O
programming	O
a	O
version	O
of	O
Civilization	O
in	O
1987	O
.	O
</s>
<s>
Sid	O
Meier	O
and	O
Bill	O
Stealey	O
co-founded	O
MicroProse	O
in	O
1982	O
to	O
develop	O
flight	B-Application
simulators	I-Application
and	O
other	O
military	O
strategy	B-Application
video	I-Application
games	I-Application
based	O
on	O
Stealey	O
's	O
past	O
experiences	O
as	O
a	O
United	O
States	O
Air	O
Force	O
pilot	O
.	O
</s>
<s>
Around	O
1989	O
,	O
Meier	O
wanted	O
to	O
expand	O
his	O
repertoire	O
beyond	O
these	O
types	O
of	O
games	O
,	O
as	O
just	O
having	O
finished	O
F-19	B-Application
Stealth	I-Application
Fighter	I-Application
(	O
1988	O
,	O
1990	O
)	O
,	O
he	O
said	O
"	O
Everything	O
I	O
thought	O
was	O
cool	O
about	O
a	O
flight	B-Application
simulator	I-Application
had	O
gone	O
into	O
that	O
game.	O
"	O
</s>
<s>
He	O
took	O
to	O
heart	O
the	O
success	O
of	O
the	O
new	O
god	O
game	O
genre	O
in	O
particular	O
SimCity	B-Application
(	O
1989	O
)	O
and	O
Populous	B-Application
(	O
1989	O
)	O
.	O
</s>
<s>
Specifically	O
with	O
SimCity	B-Application
,	O
Meier	O
recognized	O
that	O
video	O
games	O
could	O
still	O
be	O
entertaining	O
based	O
on	O
building	O
something	O
up	O
.	O
</s>
<s>
Shelley	O
had	O
joined	O
MicroProse	O
finding	O
that	O
the	O
board	O
game	O
market	O
was	O
weakening	O
in	O
contrast	O
to	O
the	O
video	O
game	O
market	O
,	O
and	O
initially	O
worked	O
on	O
F-19	B-Application
Stealth	I-Application
Fighter	I-Application
.	O
</s>
<s>
The	O
two	O
initially	O
worked	O
on	O
ideas	O
for	O
Covert	B-Application
Action	I-Application
,	O
but	O
had	O
put	O
these	O
aside	O
when	O
they	O
came	O
up	O
with	O
the	O
concepts	O
for	O
Railroad	B-Application
Tycoon	I-Application
(	O
1990	O
)	O
,	O
based	O
loosely	O
on	O
the	O
1829/1830	O
board	O
games	O
.	O
</s>
<s>
Railroad	B-Application
Tycoon	I-Application
was	O
generally	O
well	O
received	O
at	O
its	O
release	O
,	O
but	O
the	O
title	O
did	O
not	O
fit	O
within	O
the	O
nature	O
of	O
flight	B-Application
simulators	I-Application
and	O
military	O
strategy	O
from	O
MicroProse	O
's	O
previous	O
catalog	O
.	O
</s>
<s>
Meier	O
and	O
Shelley	O
had	O
started	O
a	O
sequel	O
to	O
Railroad	B-Application
Tycoon	I-Application
shortly	O
after	O
its	O
release	O
,	O
but	O
Stealey	O
canceled	O
the	O
project	O
.	O
</s>
<s>
One	O
positive	O
aspect	O
both	O
had	O
taken	O
from	O
Railroad	B-Application
Tycoon	I-Application
was	O
the	O
idea	O
of	O
multiple	O
smaller	O
systems	O
working	O
together	O
at	O
the	O
same	O
time	O
and	O
the	O
player	O
having	O
to	O
manage	O
them	O
.	O
</s>
<s>
Some	O
time	O
later	O
,	O
both	O
discussed	O
their	O
love	O
of	O
the	O
original	O
Empire	B-Application
computer	O
games	O
,	O
and	O
Meier	O
challenged	O
Shelley	O
to	O
give	O
him	O
ten	O
things	O
he	O
would	O
change	O
about	O
Empire	B-Application
;	O
Shelley	O
provided	O
him	O
with	O
twelve	O
.	O
</s>
<s>
Around	O
May	O
1990	O
,	O
Meier	O
presented	O
Shelley	O
with	O
a	O
5-1/4	O
"	O
floppy	B-Device
disk	I-Device
which	O
contained	O
the	O
first	O
prototype	O
of	O
Civilization	O
based	O
on	O
their	O
past	O
discussions	O
and	O
Shelley	O
's	O
list	O
.	O
</s>
<s>
His	O
prototype	O
took	O
elements	O
from	O
Empire	B-Application
,	O
Railroad	B-Application
Tycoon	I-Application
,	O
SimCity	B-Application
and	O
the	O
Civilization	O
board	O
game	O
.	O
</s>
<s>
This	O
initial	O
version	O
of	O
this	O
game	O
was	O
a	O
real-time	O
simulation	O
,	O
with	O
the	O
player	O
defining	O
zones	O
for	O
their	O
population	O
to	O
grow	O
similar	O
to	O
zoning	O
in	O
SimCity	B-Application
.	O
</s>
<s>
During	O
this	O
period	O
,	O
Stealey	O
and	O
the	O
other	O
managers	O
became	O
concerned	O
that	O
this	O
game	O
did	O
not	O
fit	O
MicroProse	O
's	O
general	O
catalog	O
as	O
strategy	B-Application
computer	I-Application
games	I-Application
had	O
not	O
yet	O
proven	O
successful	O
.	O
</s>
<s>
A	O
few	O
months	O
into	O
the	O
development	O
,	O
Stealey	O
requested	O
them	O
to	O
put	O
the	O
project	O
on	O
hold	O
and	O
complete	O
Covert	B-Application
Action	I-Application
,	O
after	O
which	O
they	O
could	O
go	O
back	O
to	O
their	O
new	O
game	O
.	O
</s>
<s>
Meier	O
and	O
Shelley	O
completed	O
Covert	B-Application
Action	I-Application
which	O
was	O
published	O
in	O
1990	O
.	O
</s>
<s>
Once	O
Covert	B-Application
Action	I-Application
was	O
released	O
,	O
Meier	O
and	O
Shelley	O
returned	O
to	O
the	O
prototype	O
.	O
</s>
<s>
They	O
incorporated	O
elements	O
of	O
city	O
management	O
and	O
military	O
aspect	O
from	O
Empire	B-Application
,	O
including	O
creating	O
individual	O
military	O
units	O
as	O
well	O
as	O
settler	O
units	O
that	O
replaced	O
the	O
functionality	O
of	O
the	O
zoning	O
approach	O
.	O
</s>
<s>
The	O
game	O
was	O
developed	O
for	O
the	O
IBM	O
PC	O
platform	O
,	O
which	O
at	O
the	O
time	O
had	O
support	O
for	O
both	O
16-color	O
EGA	B-Device
to	O
256-color	O
VGA	B-Protocol
;	O
Meier	O
opted	O
to	O
support	O
both	O
16-color	O
and	O
256-color	O
graphics	O
to	O
allow	O
the	O
game	O
to	O
run	O
on	O
both	O
EGA/Tandy	O
and	O
VGA/MCGA	O
systems	O
.	O
</s>
<s>
Meier	O
had	O
noted	O
the	O
board	O
game	O
's	O
influence	O
but	O
considered	O
it	O
not	O
as	O
great	O
as	O
Empire	B-Application
or	O
SimCity	B-Application
,	O
while	O
others	O
have	O
noted	O
significant	O
differences	O
that	O
made	O
the	O
video	O
game	O
far	O
different	O
from	O
the	O
board	O
game	O
such	O
as	O
the	O
non-linearity	O
introduced	O
by	O
Meier	O
's	O
technology	O
tree	O
.	O
</s>
<s>
The	O
game	O
,	O
in	O
addition	O
to	O
better	O
support	O
for	O
Windows	B-Application
3.1	I-Application
and	O
Windows	B-Application
95	I-Application
,	O
supported	O
connectivity	O
through	O
LAN	B-General_Concept
,	O
primitive	O
Internet	O
play	O
,	O
modem	O
,	O
and	O
direct	O
serial	O
link	O
,	O
and	O
included	O
a	O
local	O
hotseat	O
mode	O
.	O
</s>
<s>
According	O
to	O
Brian	O
Reynolds	O
,	O
who	O
led	O
the	O
development	O
of	O
Civilization	B-Application
II	I-Application
,	O
MicroProse	O
"	O
sincerely	O
believed	O
that	O
CivNet	O
was	O
going	O
to	O
be	O
a	O
much	O
more	O
important	O
product	O
"	O
than	O
the	O
next	O
single-player	O
Civilization	O
game	O
that	O
he	O
and	O
Jeff	O
Briggs	O
had	O
started	O
working	O
on	O
.	O
</s>
<s>
Reynolds	O
said	O
that	O
because	O
their	O
project	O
was	O
seen	O
as	O
a	O
side	O
effort	O
with	O
little	O
risk	O
,	O
they	O
were	O
able	O
to	O
innovate	O
new	O
ideas	O
into	O
Civilization	B-Application
II	I-Application
.	O
</s>
<s>
As	O
a	O
net	O
result	O
,	O
CivNet	O
was	O
generally	O
overshadowed	O
by	O
Civilization	B-Application
II	I-Application
which	O
was	O
released	O
in	O
the	O
following	O
year	O
.	O
</s>
<s>
Civilization	O
critical	O
success	O
created	O
a	O
"	O
golden	O
period	O
of	O
MicroProse	O
"	O
where	O
there	O
was	O
more	O
potential	O
for	O
similar	O
strategy	B-Application
games	I-Application
to	O
succeed	O
,	O
according	O
to	O
Meier	O
.	O
</s>
<s>
Shelley	O
left	O
MicroProse	O
in	O
1992	O
and	O
joined	O
Ensemble	O
Studios	O
,	O
where	O
he	O
used	O
his	O
experience	O
with	O
Civilization	O
to	O
design	O
the	O
Age	B-Application
of	I-Application
Empires	I-Application
games	O
.	O
</s>
<s>
Meier	O
would	O
continue	O
and	O
develop	O
Civilization	B-Application
II	I-Application
along	O
with	O
Brian	O
Reynolds	O
,	O
who	O
served	O
in	O
a	O
similar	O
role	O
to	O
Shelley	O
as	O
design	O
assistant	O
,	O
as	O
well	O
as	O
help	O
from	O
Jeff	O
Briggs	O
and	O
Douglas	O
Kaufman	O
.	O
</s>
<s>
Civilization	O
has	O
been	O
called	O
one	O
of	O
the	O
most	O
important	O
strategy	B-Application
games	I-Application
of	O
all	O
time	O
,	O
and	O
has	O
a	O
loyal	O
following	O
of	O
fans	O
.	O
</s>
<s>
This	O
high	O
level	O
of	O
interest	O
has	O
led	O
to	O
the	O
creation	O
of	O
a	O
number	O
of	O
free	B-Application
and	I-Application
open	I-Application
source	I-Application
versions	O
and	O
inspired	O
similar	O
games	O
by	O
other	O
commercial	O
developers	O
.	O
</s>
<s>
They	O
commented	O
:	O
"	O
Civilization	B-Application
is	I-Application
one	O
of	O
the	O
highest	O
dollar-to-play-ratio	O
entertainments	O
we	O
've	O
enjoyed	O
.	O
</s>
<s>
Civilization	O
won	O
the	O
Origins	O
Award	O
in	O
the	O
category	O
Best	O
Military	O
or	O
Strategy	B-Application
Computer	I-Application
Game	I-Application
of	O
1991	O
.	O
</s>
<s>
A	O
critic	O
for	O
Next	O
Generation	O
judged	O
the	O
Super	B-Application
NES	I-Application
version	O
to	O
be	O
a	O
disappointing	O
port	O
,	O
with	O
a	O
cumbersome	O
menu	O
system	O
(	O
particularly	O
that	O
the	O
"	O
City	O
"	O
and	O
"	O
Production	O
"	O
windows	B-Application
are	O
on	O
separate	O
screens	O
)	O
,	O
an	O
unintuitive	O
button	O
configuration	O
,	O
and	O
ugly	O
scaled	O
down	O
graphics	O
.	O
</s>
<s>
Sir	O
Garnabus	O
of	O
GamePro	O
,	O
in	O
contrast	O
,	O
was	O
pleased	O
with	O
the	O
Super	B-Application
NES	I-Application
version	O
's	O
interface	O
,	O
and	O
said	O
the	O
graphics	O
and	O
audio	O
are	O
above	O
that	O
of	O
a	O
typical	O
strategy	B-Application
game	I-Application
.	O
</s>
<s>
He	O
also	O
said	O
the	O
game	O
stood	O
out	O
among	O
the	O
Super	B-Application
NES	I-Application
's	O
generally	O
action-oriented	O
library	O
.	O
</s>
<s>
In	O
Poland	O
,	O
it	O
was	O
included	O
in	O
the	O
retrospective	O
lists	O
of	O
the	O
best	O
Amiga	B-Device
games	O
by	O
Wirtualna	O
Polska	O
(	O
ranked	O
ninth	O
)	O
and	O
CHIP	O
(	O
ranked	O
fifth	O
)	O
.	O
</s>
<s>
That	O
same	O
year	O
,	O
PC	O
Gamer	O
UK	O
named	O
its	O
Windows	B-Application
release	O
the	O
sixth	O
best	O
computer	O
game	O
of	O
all	O
time	O
,	O
calling	O
it	O
Sid	O
Meier	O
's	O
"	O
crowning	O
glory	O
"	O
.	O
</s>
<s>
By	O
the	O
release	O
of	O
Civilization	B-Application
II	I-Application
in	O
1996	O
,	O
Civilization	O
had	O
sold	O
over	O
850,000	O
copies	O
.	O
</s>
<s>
There	O
have	O
been	O
several	O
sequels	O
to	O
Civilization	O
,	O
including	O
Civilization	B-Application
II	I-Application
(	O
1996	O
)	O
,	O
Civilization	B-Application
III	I-Application
(	O
2001	O
)	O
,	O
Civilization	B-Application
IV	I-Application
(	O
2005	O
)	O
,	O
Civilization	B-Application
Revolution	I-Application
(	O
2008	O
)	O
,	O
Civilization	B-Application
V	I-Application
(	O
2010	O
)	O
,	O
and	O
Civilization	B-Application
VI	I-Application
in	O
2016	O
.	O
</s>
<s>
In	O
1994	O
,	O
Meier	O
produced	O
a	O
similar	O
game	O
titled	O
Colonization	B-Application
.	O
</s>
<s>
Civilization	B-Application
is	I-Application
generally	O
considered	O
the	O
first	O
major	O
game	O
in	O
the	O
genre	O
of	O
"	O
4X	B-Application
"	O
,	O
with	O
the	O
four	O
"	O
X	O
"	O
s	O
equating	O
to	O
"	O
explore	O
,	O
expand	O
,	O
exploit	O
,	O
and	O
exterminate	O
"	O
,	O
a	O
term	O
developed	O
by	O
Alan	O
Emrich	O
in	O
promoting	O
1993	O
's	O
Master	B-Application
of	I-Application
Orion	I-Application
.	O
</s>
<s>
While	O
other	O
video	O
games	O
with	O
the	O
principles	O
of	O
4X	B-Application
had	O
been	O
released	O
prior	O
to	O
Civilization	O
,	O
future	O
4X	B-Application
games	I-Application
would	O
attribute	O
some	O
of	O
their	O
basic	O
design	O
principles	O
to	O
Civilization	O
.	O
</s>
<s>
An	O
Easter	O
egg	O
named	O
"	O
Nuclear	O
Gandhi	O
"	O
in	O
most	O
of	O
the	O
games	O
in	O
the	O
series	O
references	O
a	O
supposed	O
integer	B-Error_Name
overflow	I-Error_Name
bug	O
in	O
Civilization	O
that	O
causes	O
a	O
computer-controlled	O
Gandhi	O
,	O
normally	O
a	O
highly	O
peaceful	O
leader	O
,	O
to	O
become	O
a	O
nuclear	O
warmonger	O
.	O
</s>
<s>
Brian	O
Reynolds	O
wrote	O
Civ	B-Application
II	I-Application
in	O
C++	O
,	O
and	O
he	O
did	O
n't	O
use	O
them	O
,	O
either	O
.	O
</s>
<s>
He	O
then	O
explains	O
the	O
overflow	B-Error_Name
error	I-Error_Name
story	O
was	O
made	O
up	O
in	O
2012	O
.	O
</s>
<s>
It	O
spread	O
from	O
there	O
to	O
a	O
Wikia	O
entry	O
,	O
then	O
eventually	O
to	O
Reddit	B-Application
,	O
and	O
was	O
picked	O
up	O
by	O
news	O
sites	O
like	O
Kotaku	O
and	O
Geek.com	O
.	O
</s>
<s>
The	O
1999	O
game	O
Sid	B-Application
Meier	I-Application
's	I-Application
Alpha	I-Application
Centauri	I-Application
was	O
also	O
created	O
by	O
Meier	O
and	O
is	O
in	O
the	O
same	O
genre	O
,	O
but	O
with	O
a	O
futuristic/space	O
theme	O
;	O
many	O
of	O
the	O
interface	O
and	O
gameplay	O
innovations	O
in	O
this	O
game	O
eventually	O
made	O
their	O
way	O
into	O
Civilization	B-Application
III	I-Application
and	O
IV	O
.	O
</s>
<s>
Alpha	B-Application
Centauri	I-Application
is	O
not	O
actually	O
a	O
sequel	O
to	O
Civilization	O
,	O
despite	O
beginning	O
with	O
the	O
same	O
event	O
that	O
ends	O
Civilization	O
and	O
Civilization	B-Application
II	I-Application
:	O
a	O
crewed	O
spacecraft	O
from	O
Earth	O
arrives	O
in	O
the	O
Alpha	B-Application
Centauri	I-Application
star	O
system	O
.	O
</s>
<s>
Firaxis	O
 '	O
2014	O
game	O
Civilization	B-Application
:	I-Application
Beyond	I-Application
Earth	I-Application
,	O
although	O
bearing	O
the	O
name	O
of	O
the	O
main	O
series	O
,	O
is	O
a	O
reimagining	O
of	O
Alpha	B-Application
Centauri	I-Application
running	O
on	O
the	O
engine	O
of	O
Civilization	B-Application
V	I-Application
.	O
</s>
<s>
A	O
1994	O
Computer	O
Gaming	O
World	O
survey	O
of	O
space	O
war	O
games	O
stated	O
that	O
"	O
the	O
lesson	O
of	O
this	O
incredibly	O
popular	O
wargame	O
has	O
not	O
been	O
lost	O
on	O
the	O
software	O
community	O
,	O
and	O
technological	O
research	O
popped	O
up	O
all	O
over	O
the	O
place	O
in	O
1993	O
"	O
,	O
citing	O
Spaceward	B-Application
Ho	I-Application
!	I-Application
</s>
<s>
and	O
Master	B-Application
of	I-Application
Orion	I-Application
as	O
examples	O
.	O
</s>
<s>
That	O
year	O
MicroProse	O
published	O
Master	B-Application
of	I-Application
Magic	I-Application
,	O
a	O
similar	O
game	O
but	O
embedded	O
in	O
a	O
medieval-fantasy	O
setting	O
where	O
instead	O
of	O
technologies	O
the	O
player	O
(	O
a	O
powerful	O
wizard	O
)	O
develops	O
spells	O
,	O
among	O
other	O
things	O
.	O
</s>
<s>
In	O
1999	O
,	O
Activision	O
released	O
Civilization	B-Application
:	I-Application
Call	I-Application
to	I-Application
Power	I-Application
,	O
a	O
sequel	O
of	O
sorts	O
to	O
Civilization	B-Application
II	I-Application
but	O
created	O
by	O
a	O
completely	O
different	O
design	O
team	O
.	O
</s>
<s>
Call	B-Application
to	I-Application
Power	I-Application
spawned	O
a	O
sequel	O
in	O
2000	O
,	O
but	O
by	O
then	O
Activision	O
had	O
sold	O
the	O
rights	O
to	O
the	O
Civilization	O
name	O
and	O
could	O
only	O
call	O
it	O
Call	B-Application
to	I-Application
Power	I-Application
II	I-Application
.	O
</s>
<s>
An	O
open	O
source	O
clone	O
of	O
Civilization	O
has	O
been	O
developed	O
under	O
the	O
name	O
of	O
Freeciv	B-Application
,	O
with	O
the	O
slogan	O
"	O
 '	O
Cause	O
civilization	O
should	O
be	O
free.	O
"	O
</s>
<s>
This	O
game	O
can	O
be	O
configured	O
to	O
match	O
the	O
rules	O
of	O
either	O
Civilization	O
or	O
Civilization	B-Application
II	I-Application
.	O
</s>
<s>
Another	O
game	O
that	O
partially	O
clones	O
Civilization	B-Application
is	I-Application
a	O
public	O
domain	O
game	O
called	O
C-evo	B-Application
.	O
</s>
