<s>
Spacebase	B-Application
DF-9	I-Application
is	O
a	O
space	O
simulator	O
video	O
game	O
developed	O
by	O
Double	O
Fine	O
Productions	O
.	O
</s>
<s>
It	O
was	O
prototyped	O
during	O
Double	O
Fine	O
's	O
open	O
Amnesia	B-Application
Fortnight	I-Application
2012	I-Application
,	O
directed	O
by	O
JP	O
Lebreton	O
.	O
</s>
<s>
After	O
being	O
released	O
as	O
an	O
open	O
beta	O
on	O
October	O
15	O
,	O
2013	O
,	O
it	O
was	O
officially	O
released	O
on	O
October	O
27	O
,	O
2014	O
,	O
for	O
Microsoft	B-Application
Windows	I-Application
,	O
OS	B-Operating_System
X	I-Operating_System
,	O
and	O
Linux	B-Application
.	O
</s>
<s>
After	O
the	O
official	O
end-of-life	O
of	O
the	O
game	O
in	O
May	O
2015	O
,	O
the	O
community	O
took	O
over	O
the	O
development	O
based	O
on	O
an	O
open-source	B-Application
code	B-Application
fork	I-Application
.	O
</s>
<s>
Spacebase	B-Application
DF-9	I-Application
was	O
one	O
of	O
several	O
ideas	O
presented	O
for	O
voting	O
for	O
Double	O
Fine	O
's	O
Amnesia	B-Application
Fortnight	I-Application
2012	I-Application
project	O
,	O
where	O
users	O
would	O
be	O
able	O
to	O
vote	O
for	O
the	O
game	O
concepts	O
they	O
felt	O
they	O
would	O
want	O
to	O
play	O
the	O
most	O
.	O
</s>
<s>
Spacebase	B-Application
DF-9	I-Application
was	O
an	O
idea	O
presented	O
by	O
designer-programmer	O
JP	O
LeBreton	O
.	O
</s>
<s>
In	O
addition	O
,	O
they	O
promised	O
to	O
release	O
the	O
game	O
's	O
Lua	B-Language
source	O
code	O
to	O
allow	O
the	O
community	O
to	O
develop	O
new	O
content	O
and	O
features	O
independently	O
.	O
</s>
<s>
In	O
September	O
2014	O
,	O
Double	O
Fine	O
announced	O
that	O
they	O
were	O
going	O
to	O
bring	O
Spacebase	B-Application
DF-9	I-Application
out	O
of	O
early	O
access	O
status	O
,	O
and	O
add	O
features	O
to	O
make	O
the	O
game	O
a	O
full	O
commercial	O
release	O
,	O
due	O
to	O
a	O
lack	O
of	O
sales	O
for	O
the	O
game	O
during	O
the	O
early	O
access	O
period	O
.	O
</s>
<s>
The	O
release	O
of	O
v1.0	O
commenced	O
on	O
October	O
27	O
,	O
2014	O
,	O
simultaneously	O
with	O
release	O
of	O
Lua	B-Language
source	O
code	O
.	O
</s>
<s>
The	O
retail	B-Application
version	O
included	O
a	O
tutorial	O
mode	O
,	O
goals	O
screen	O
and	O
bugfixes	O
.	O
</s>
<s>
Part	O
of	O
the	O
game	O
's	O
source	O
code	O
was	O
released	O
to	O
the	O
public	O
under	O
the	O
CPAL	B-License
open-source	B-Application
license	O
,	O
and	O
since	O
then	O
,	O
fans	O
have	O
worked	O
to	O
continue	O
the	O
game	O
's	O
development	O
and	O
support	O
.	O
</s>
<s>
Spacebase	B-Application
DF-9	I-Application
has	O
a	O
46/100	O
Metacritic	O
score	O
.	O
</s>
<s>
IGN	O
gave	O
the	O
game	O
a	O
6.8/10	O
score	O
and	O
commented	O
:	O
"	O
Spacebase	B-Application
DF-9	I-Application
is	O
charming	O
,	O
and	O
its	O
random	O
events	O
give	O
you	O
more	O
to	O
do	O
and	O
worry	O
about	O
than	O
something	O
like	O
Banished	B-Application
.	O
</s>
