<s>
Blackbox	B-Operating_System
is	O
an	O
indie	O
puzzle	O
game	O
developed	O
and	O
designed	O
by	O
Ryan	O
McLeod	O
,	O
with	O
sound	O
design	O
by	O
Gus	O
Callahan	O
.	O
</s>
<s>
In	O
Blackbox	B-Operating_System
,	O
the	O
player	O
solves	O
puzzles	O
by	O
discovering	O
and	O
exploring	O
the	O
device	O
's	O
hardware	O
and	O
operating	O
system	O
;	O
rarely	O
do	O
solutions	O
involve	O
touch	O
mechanics	O
.	O
</s>
<s>
Blackbox	B-Operating_System
won	O
a	O
2017	O
Apple	O
Design	O
Award	O
for	O
innovation	O
and	O
excellence	O
in	O
design	O
and	O
accessibility	O
and	O
was	O
recognized	O
as	O
a	O
2018	O
Webby	O
Award	O
Honoree	O
in	O
the	O
Puzzle	O
and	O
Best	O
Visual	O
Design	O
categories	O
.	O
</s>
<s>
It	O
has	O
also	O
won	O
a	O
Golden	O
Apple	O
from	O
Apple	O
Vis	O
(	O
an	O
online	O
community	O
of	O
blind	O
and	O
low-vision	O
Apple	O
product	O
users	O
)	O
as	O
“	O
Best	O
iOS	B-Application
Game	O
”	O
for	O
2017	O
.	O
</s>
<s>
In	O
Blackbox	B-Operating_System
,	O
players	O
attempt	O
to	O
turn	O
on	O
“	O
lights	O
”	O
by	O
solving	O
their	O
associated	O
challenge	O
.	O
</s>
<s>
Each	O
challenge	O
has	O
hints	O
of	O
varying	O
degrees	O
of	O
helpfulness	O
that	O
can	O
be	O
revealed	O
using	O
an	O
in	B-Application
game	I-Application
currency	I-Application
of	O
hint	O
credits	O
which	O
can	O
be	O
bought	O
or	O
earned	O
in	O
different	O
ways	O
.	O
</s>
<s>
Blackbox	B-Operating_System
is	O
free	O
to	O
download	O
,	O
includes	O
53	O
free	O
challenges	O
,	O
and	O
two	O
paid	O
expansion	O
packs	O
(	O
the	O
“	O
Erudite	O
Pack	O
”	O
which	O
includes	O
11	O
challenges	O
,	O
and	O
the	O
“	O
Push	O
Pack	O
”	O
which	O
includes	O
8	O
)	O
.	O
</s>
<s>
Blackbox	B-Operating_System
was	O
developed	O
over	O
12	O
months	O
beginning	O
in	O
late	O
2014	O
by	O
Ryan	O
McLeod	O
.	O
</s>
<s>
Its	O
visual	O
style	O
was	O
inspired	O
by	O
indie	O
games	O
such	O
as	O
Threes	B-Application
,	O
Monument	B-Application
Valley	I-Application
,	O
Letterpress	B-Application
,	O
and	O
Grow	O
.	O
</s>
<s>
Its	O
puzzles	O
were	O
inspired	O
by	O
indie	O
apps	O
and	O
games	O
Machinarium	B-Application
,	O
Fez	B-Application
,	O
Braid	B-Application
,	O
Portal	B-Application
,	O
Limbo	B-Application
,	O
Hatch	O
,	O
Clear	O
,	O
Peek	O
,	O
and	O
Inception	O
as	O
well	O
as	O
augmented	O
real	O
world	O
games	O
,	O
geocaching	B-Application
,	O
and	O
physical	O
puzzles	O
.	O
</s>
<s>
After	O
a	O
closed	O
beta	O
test	O
,	O
it	O
was	O
released	O
for	O
iOS	B-Application
on	O
February	O
25	O
,	O
2016	O
;	O
the	O
game	O
is	O
under	O
active	O
development	O
with	O
new	O
puzzles	O
and	O
features	O
added	O
regularly	O
.	O
</s>
<s>
The	O
game	O
has	O
received	O
over	O
90,000	O
five-star	O
reviews	O
on	O
the	O
iOS	B-Application
App	O
Store	O
worldwide	O
.	O
</s>
