<s>
Return	B-Application
to	I-Application
Dark	I-Application
Castle	I-Application
is	O
a	O
2008	O
platform	O
game	O
for	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
developed	O
by	O
Z	O
Sculpt	O
.	O
</s>
<s>
It	O
is	O
the	O
third	O
and	O
final	O
game	O
in	O
the	O
Dark	B-Device
Castle	I-Device
series	O
,	O
following	O
Dark	B-Device
Castle	I-Device
(	O
1986	O
)	O
and	O
Beyond	B-Application
Dark	I-Application
Castle	I-Application
(	O
1987	O
)	O
.	O
</s>
<s>
Development	O
on	O
the	O
game	O
,	O
begun	O
in	O
1996	O
,	O
was	O
notoriously	O
protracted	O
,	O
and	O
the	O
game	O
was	O
often	O
labeled	O
vaporware	B-Application
.	O
</s>
<s>
Return	B-Application
to	I-Application
Dark	I-Application
Castle	I-Application
was	O
originally	O
scheduled	O
to	O
be	O
released	O
in	O
Winter	O
2000	O
,	O
but	O
was	O
not	O
released	O
until	O
March	O
14	O
,	O
2008	O
.	O
</s>
<s>
In	O
February	O
2011	O
,	O
Super	O
Happy	O
Fun	O
Fun	O
,	O
Inc	O
.	O
released	O
an	O
updated	O
version	O
of	O
the	O
game	O
on	O
the	O
Mac	O
App	O
Store	O
that	O
included	O
all	O
30	O
original	O
Dark	B-Device
Castle	I-Device
and	O
Beyond	B-Application
Dark	I-Application
Castle	I-Application
levels	O
and	O
added	O
50	O
new	O
levels	O
.	O
</s>
<s>
The	O
player	O
fights	O
their	O
way	O
through	O
various	O
areas	O
,	O
inside	O
and	O
around	O
the	O
Dark	B-Device
Castle	I-Device
,	O
in	O
an	O
attempt	O
to	O
defeat	O
the	O
Black	O
Knight	O
.	O
</s>
<s>
The	O
player	O
's	O
character	O
,	O
named	O
Bryant	O
by	O
default	O
,	O
is	O
the	O
nephew	O
of	O
Duncan	O
,	O
the	O
protagonist	O
of	O
the	O
earlier	O
Dark	B-Device
Castle	I-Device
games	O
.	O
</s>
<s>
In	O
the	O
game	O
's	O
intro	O
,	O
it	O
is	O
revealed	O
that	O
Duncan	O
never	O
returned	O
from	O
his	O
quest	O
to	O
the	O
Dark	B-Device
Castle	I-Device
.	O
</s>
<s>
Bryant	O
must	O
collect	O
10	O
orbs	O
hidden	O
around	O
the	O
castle	O
(	O
similar	O
to	O
the	O
orbs	O
from	O
Beyond	B-Application
Dark	I-Application
Castle	I-Application
)	O
before	O
he	O
can	O
confront	O
the	O
Black	O
Knight	O
.	O
</s>
<s>
The	O
previous	O
games	O
each	O
had	O
15	O
levels	O
,	O
and	O
Return	B-Application
to	I-Application
Dark	I-Application
Castle	I-Application
contains	O
all	O
the	O
levels	O
from	O
these	O
first	O
two	O
games	O
plus	O
over	O
50	O
new	O
levels	O
.	O
</s>
<s>
These	O
three	O
interconnected	O
rooms	O
are	O
the	O
"	O
starting	O
"	O
points	O
for	O
the	O
original	O
Dark	B-Device
Castle	I-Device
,	O
Beyond	B-Application
Dark	I-Application
Castle	I-Application
and	O
Return	B-Application
to	I-Application
Dark	I-Application
Castle	I-Application
,	O
respectively	O
.	O
</s>
<s>
These	O
recording	O
files	O
can	O
be	O
shared	O
with	O
others	O
players	O
,	O
although	O
recordings	O
from	O
different	O
versions	O
of	O
Return	B-Application
to	I-Application
Dark	I-Application
Castle	I-Application
are	O
not	O
compatible	O
,	O
and	O
there	O
are	O
playback	O
bugs	O
,	O
particularly	O
in	O
longer	O
recordings	O
.	O
</s>
<s>
In	O
December	O
2002	O
,	O
it	O
was	O
announced	O
that	O
Return	B-Application
to	I-Application
Dark	I-Application
Castle	I-Application
would	O
include	O
a	O
level	O
editor	O
;	O
with	O
this	O
editor	O
,	O
players	O
will	O
be	O
able	O
to	O
make	O
their	O
own	O
levels	O
or	O
even	O
create	O
an	O
entire	O
quest	O
.	O
</s>
