<s>
Black	B-Operating_System
Shades	I-Operating_System
is	O
a	O
free	B-Application
and	O
open-source	B-Application
video	I-Application
game	I-Application
developed	O
by	O
Wolfire	O
Games	O
.	O
</s>
<s>
Originally	O
released	O
for	O
Mac	B-Operating_System
OS	I-Operating_System
9	I-Operating_System
it	O
was	O
ported	O
to	O
other	O
platforms	O
due	O
to	O
the	O
source	O
code	O
availability	O
.	O
</s>
<s>
The	O
object	O
of	O
Black	B-Operating_System
Shades	I-Operating_System
is	O
to	O
defend	O
the	O
VIP	O
from	O
assassins	O
and	O
zombies	O
for	O
a	O
set	O
amount	O
of	O
time	O
.	O
</s>
<s>
The	O
game	O
's	O
developer	O
David	O
Rosen	O
(	O
founder	O
of	O
Wolfire	O
Games	O
)	O
aimed	O
for	O
Black	B-Operating_System
Shades	I-Operating_System
a	O
much	O
simpler	O
graphical	O
style	O
than	O
in	O
GLFighters	O
and	O
Lugaru	B-Application
.	O
</s>
<s>
From	O
2003	O
to	O
2008	O
,	O
the	O
source	O
code	O
was	O
hosted	O
on	O
icculus.org	O
under	O
the	O
"	O
uDevGame	O
License	B-License
"	O
.	O
</s>
<s>
In	O
2021	O
,	O
David	O
Rosen	O
relicensed	O
the	O
game	O
under	O
the	O
GNU	B-License
General	I-License
Public	I-License
License	I-License
version	O
3	O
or	O
later	O
.	O
</s>
<s>
Black	B-Operating_System
Shades	I-Operating_System
was	O
released	O
in	O
2002	O
for	O
PC	B-Device
with	O
Mac	B-Operating_System
OS	I-Operating_System
9	I-Operating_System
,	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
,	O
and	O
Windows	B-Application
.	O
</s>
<s>
A	O
Linux	B-Application
port	O
was	O
created	O
by	O
Zachary	O
Slater	O
.	O
</s>
<s>
In	O
2009	O
the	O
game	O
was	O
also	O
ported	O
to	O
the	O
Apple	O
Inc	O
.	O
iPhone	B-Device
and	O
iPod	B-Device
Touch	I-Device
.	O
</s>
<s>
In	O
2013	O
the	O
game	O
was	O
ported	O
to	O
the	O
ARM-based	O
OpenPandora	B-Device
handheld	O
.	O
</s>
<s>
Due	O
to	O
Black	B-Operating_System
Shades	I-Operating_System
 '	O
open-source	B-Application
nature	O
,	O
this	O
allows	O
it	O
to	O
be	O
modified	O
extensively	O
.	O
</s>
<s>
The	O
Black	B-Operating_System
Shades	I-Operating_System
Enhanced	O
partial	O
conversion	O
authored	O
by	O
Michael	O
'	O
Bitl	O
 '	O
Hart	O
,	O
offers	O
more	O
capabilities	O
such	O
as	O
a	O
higher	O
frames-per-second	O
limit	O
,	O
the	O
option	O
to	O
use	O
a	O
windowed	O
mode	O
,	O
and	O
the	O
option	O
to	O
adjust	O
the	O
player	O
's	O
field-of-view	O
.	O
</s>
<s>
Eurogamer	O
's	O
Jim	O
Rossignol	O
named	O
Black	B-Operating_System
Shades	I-Operating_System
number	O
2	O
in	O
a	O
top	O
20	O
list	O
of	O
Summer	O
of	O
PC	B-Device
Freeware	B-License
games	O
.	O
</s>
<s>
Joe	O
Martin	O
from	O
bit-tech.net	O
recommended	O
the	O
game	O
even	O
in	O
2009	O
with	O
"	O
Black	B-Operating_System
Shades	I-Operating_System
is	O
n’t	O
a	O
new	O
game	O
,	O
it	O
’s	O
just	O
a	O
free	B-Application
game	I-Application
that	O
I	O
really	O
like	O
.	O
</s>
<s>
It	O
’s	O
basically	O
the	O
opposite	O
of	O
Hitman	B-Application
,	O
but	O
reduced	O
down	O
to	O
twitch	O
shooter	O
basics	O
and	O
presented	O
in	O
a	O
typically	O
indie	O
way	O
.	O
</s>
