<s>
The	B-Application
Castle	I-Application
Doctrine	I-Application
is	O
a	O
2014	O
strategy	B-Application
video	I-Application
game	I-Application
developed	O
and	O
published	O
by	O
Jason	O
Rohrer	O
for	O
Microsoft	B-Application
Windows	I-Application
,	O
OS	B-Operating_System
X	I-Operating_System
,	O
and	O
Linux	B-Application
via	O
Valve	O
's	O
Steam	B-Application
platform	O
.	O
</s>
<s>
The	O
game	O
was	O
released	O
on	O
January	O
29	O
,	O
2014	O
for	O
all	O
platforms	O
and	O
is	O
available	O
as	O
public	B-Application
domain	I-Application
software	I-Application
on	O
SourceForge	B-Application
.	O
</s>
<s>
The	B-Application
Castle	I-Application
Doctrine	I-Application
incorporates	O
elements	O
of	O
puzzle	O
,	O
strategy	B-Application
,	O
stealth	O
,	O
and	O
roguelike	O
games	O
,	O
viewed	O
from	O
a	O
2D	O
perspective	O
.	O
</s>
<s>
All	O
deaths	O
in	O
the	O
game	O
are	O
permanent	B-Application
;	O
upon	O
dying	O
,	O
the	O
player	O
must	O
create	O
a	O
new	O
character	O
.	O
</s>
<s>
Being	O
caught	O
in	O
one	O
's	O
own	O
traps	O
has	O
the	O
same	O
consequence	O
as	O
any	O
other	O
trap	O
in	O
the	O
game	O
:	O
permadeath	B-Application
.	O
</s>
<s>
The	B-Application
Castle	I-Application
Doctrine	I-Application
was	O
created	O
by	O
indie	O
developer	O
Jason	O
Rohrer	O
;	O
its	O
ideas	O
were	O
drawn	O
from	O
Rohrer	O
's	O
childhood	O
anxieties	O
about	O
his	O
family	O
's	O
house	O
being	O
burgled	O
,	O
and	O
his	O
adult	O
sense	O
of	O
responsibility	O
over	O
protecting	O
his	O
family	O
.	O
</s>
<s>
The	O
game	O
's	O
central	O
theme	O
is	O
the	B-Application
castle	I-Application
doctrine	I-Application
and	O
includes	O
the	O
issue	O
of	O
gun	O
rights	O
;	O
Rohrer	O
created	O
it	O
partially	O
as	O
an	O
"	O
artistic	O
statement	O
"	O
on	O
defending	O
one	O
's	O
family	O
through	O
violence	O
.	O
</s>
<s>
He	O
has	O
noted	O
that	O
some	O
players	O
have	O
complained	O
about	O
not	O
being	O
able	O
to	O
decorate	O
their	O
houses	O
non-functionally	O
,	O
but	O
is	O
unsympathetic	O
,	O
saying	O
that	O
the	O
game	O
is	O
not	O
FarmVille	B-Application
.	O
</s>
<s>
The	O
game	O
was	O
,	O
however	O
,	O
influenced	O
by	O
Minecraft	B-Application
,	O
which	O
—	O
while	O
heavily	O
tied	O
to	O
cosmetic	O
decoration	O
—	O
involves	O
similar	O
themes	O
of	O
protecting	O
one	O
's	O
creations	O
from	O
other	O
players	O
as	O
in	O
The	B-Application
Castle	I-Application
Doctrine	I-Application
.	O
</s>
<s>
The	B-Application
Castle	I-Application
Doctrine	I-Application
was	O
first	O
released	O
as	O
a	O
paid	O
alpha	O
and	O
sold	O
at	O
half-price	O
from	O
March	O
2013	O
until	O
its	O
official	O
release	O
on	O
January	O
29	O
,	O
2014	O
.	O
</s>
<s>
The	O
game	O
has	O
been	O
placed	O
in	O
the	O
public	O
domain	O
and	O
is	O
hosted	O
on	O
SourceForge	B-Application
.	O
</s>
<s>
The	B-Application
Castle	I-Application
Doctrine	I-Application
received	O
mixed	O
reviews	O
from	O
critics	O
,	O
with	O
a	O
score	O
on	O
review	O
aggregator	O
Metacritic	O
of	O
58/100	O
.	O
</s>
