<s>
Gravity	B-Application
Bone	I-Application
is	O
a	O
2008	O
freeware	B-License
adventure	O
game	O
developed	O
and	O
published	O
by	O
Blendo	O
Games	O
.	O
</s>
<s>
The	O
game	O
employs	O
a	O
modified	O
version	O
of	O
id	O
Software	O
's	O
id	B-Application
Tech	I-Application
2	I-Application
engine	O
—	O
originally	O
used	O
for	O
Quake	B-Application
2	I-Application
—	O
and	O
incorporates	O
music	O
from	O
films	O
by	O
director	O
Wong	O
Kar-wai	O
,	O
which	O
were	O
originally	O
performed	O
by	O
Xavier	O
Cugat	O
.	O
</s>
<s>
The	O
game	O
was	O
released	O
for	O
Microsoft	B-Application
Windows	I-Application
in	O
August	O
2008	O
.	O
</s>
<s>
Gravity	B-Application
Bone	I-Application
received	O
critical	O
acclaim	O
from	O
video	O
game	O
journalists	O
.	O
</s>
<s>
It	O
was	O
called	O
"	O
a	O
pleasure	O
to	O
experience	O
"	O
by	O
Charles	O
Onyett	O
from	O
IGN	O
,	O
and	O
received	O
comparisons	O
to	O
games	O
such	O
as	O
Team	B-Application
Fortress	I-Application
2	I-Application
and	O
Portal	B-Application
.	O
</s>
<s>
A	O
sequel	O
,	O
Thirty	B-Application
Flights	I-Application
of	I-Application
Loving	I-Application
,	O
was	O
released	O
in	O
2012	O
.	O
</s>
<s>
Gravity	B-Application
Bone	I-Application
is	O
a	O
first-person	O
adventure	O
video	O
game	O
that	O
lasts	O
around	O
20	O
minutes	O
,	O
and	O
is	O
set	O
in	O
the	O
fictional	O
city	O
of	O
Nuevos	O
Aires	O
.	O
</s>
<s>
The	O
tutorial	O
system	O
used	O
to	O
demonstrate	O
routine	O
gameplay	O
elements	O
such	O
as	O
object	O
interaction	O
and	O
movement	O
is	O
disguised	O
as	O
the	O
first	O
level	O
of	O
Gravity	B-Application
Bone	I-Application
.	O
</s>
<s>
Gravity	B-Application
Bone	I-Application
was	O
developed	O
by	O
Brendon	O
Chung	O
under	O
his	O
video	O
game	O
studio	O
Blendo	O
Games	O
.	O
</s>
<s>
Chung	O
,	O
who	O
worked	O
as	O
a	O
level	O
designer	O
for	O
Pandemic	O
Studios	O
,	O
has	O
contributed	O
to	O
the	O
development	O
of	O
titles	O
such	O
as	O
Full	B-Application
Spectrum	I-Application
Warrior	I-Application
and	O
Lord	B-Application
of	I-Application
the	I-Application
Rings	I-Application
:	I-Application
Conquest	I-Application
.	O
</s>
<s>
Four	O
incarnations	O
of	O
Gravity	B-Application
Bone	I-Application
were	O
produced	O
during	O
its	O
one-year	O
development	O
.	O
</s>
<s>
Chung	O
commented	O
during	O
an	O
interview	O
with	O
FidGit	O
that	O
"	O
Gravity	B-Application
Bone	I-Application
started	O
out	O
very	O
different	O
from	O
what	O
it	O
was	O
and	O
ended	O
up	O
getting	O
scrapped	O
...	O
so	O
on	O
and	O
so	O
forth	O
until	O
this	O
version	O
came	O
out.	O
"	O
</s>
<s>
The	O
first	O
version	O
of	O
Gravity	B-Application
Bone	I-Application
featured	O
more	O
typical	O
first-person	O
shooter	O
elements	O
than	O
the	O
released	O
version	O
,	O
and	O
was	O
based	O
on	O
a	O
series	O
of	O
Quake	B-Application
2	I-Application
maps	O
entitled	O
Citizen	O
Abel	O
.	O
</s>
<s>
Development	O
shifted	O
in	O
a	O
new	O
direction	O
,	O
and	O
Gravity	B-Application
Bone	I-Application
was	O
transformed	O
;	O
the	O
player	O
would	O
act	O
as	O
a	O
computer	O
hacker	O
,	O
"	O
hacking	O
stuff	O
all	O
the	O
time.	O
"	O
</s>
<s>
He	O
stated	O
that	O
he	O
did	O
not	O
feel	O
comfortable	O
developing	O
Gravity	B-Application
Bone	I-Application
as	O
a	O
first-person	O
shooter	O
game	O
,	O
and	O
kept	O
adding	O
"	O
bits	O
and	O
bits	O
of	O
more	O
and	O
more	O
unconventional	O
"	O
elements	O
as	O
a	O
result	O
.	O
</s>
<s>
Gravity	B-Application
Bone	I-Application
was	O
developed	O
using	O
a	O
modified	O
version	O
of	O
id	O
Software	O
's	O
id	B-Application
Tech	I-Application
2	I-Application
,	O
the	O
graphics	O
engine	O
for	O
Quake	B-Application
2	I-Application
.	O
</s>
<s>
Chung	O
acknowledged	O
that	O
although	O
he	O
has	O
worked	O
with	O
newer	O
,	O
"	O
powerful	O
and	O
flexible	O
"	O
engines	O
,	O
he	O
preferred	O
the	O
older	O
engine	O
because	O
it	O
was	O
released	O
as	O
an	O
open	B-Application
source	I-Application
platform	I-Application
,	O
"	O
so	O
you	O
can	O
redistribute	O
it	O
for	O
free.	O
"	O
</s>
<s>
The	O
voice	O
work	O
featured	O
in	O
the	O
briefings	O
in	O
Gravity	B-Application
Bone	I-Application
was	O
produced	O
using	O
text-to-speech	B-Application
programs	O
,	O
and	O
the	O
game	O
incorporates	O
three	O
songs	O
by	O
Xavier	O
Cugat	O
and	O
His	O
Orchesetra	O
:	O
"	O
Maria	O
Elena	O
"	O
,	O
"	O
Brazil	O
"	O
,	O
and	O
"	O
Perfidia	O
"	O
.	O
</s>
<s>
Charles	O
Onyett	O
from	O
IGN	O
applauded	O
Gravity	B-Application
Bone	I-Application
,	O
saying	O
that	O
it	O
is	O
"	O
a	O
game	O
that	O
appears	O
to	O
toy	O
with	O
the	O
notions	O
of	O
heroism	O
and	O
villainy	O
,	O
and	O
the	O
ways	O
the	O
player	O
identifies	O
with	O
,	O
and	O
is	O
directed	O
toward	O
,	O
both	O
roles.	O
"	O
</s>
<s>
Burch	O
concluded	O
that	O
Gravity	B-Application
Bone	I-Application
is	O
"	O
a	O
great	O
ride	O
"	O
,	O
and	O
that	O
the	O
"	O
atmosphere	O
and	O
style	O
alone	O
will	O
barrel	O
you	O
through	O
to	O
the	O
journey	O
's	O
end	O
,	O
which	O
comes	O
all	O
too	O
soon.	O
"	O
</s>
<s>
Derek	O
Yu	O
from	O
The	O
Indie	O
Games	O
Source	O
compared	O
the	O
game	O
with	O
Portal	B-Application
and	O
stated	O
that	O
Chung	O
was	O
able	O
to	O
develop	O
"	O
an	O
impeccable	O
flair	O
for	O
graphic	O
design	O
"	O
while	O
manufacturing	O
Gravity	B-Application
Bone	I-Application
.	O
</s>
<s>
An	O
editor	O
from	O
The	O
Refined	O
Geek	O
was	O
pleased	O
with	O
Gravity	B-Application
Bone	I-Application
and	O
its	O
sequel	O
,	O
Thirty	B-Application
Flights	I-Application
of	I-Application
Loving	I-Application
,	O
awarding	O
them	O
each	O
a	O
score	O
of	O
8	O
out	O
of	O
10	O
and	O
stating	O
,	O
"	O
the	O
enjoyment	O
from	O
these	O
games	O
comes	O
from	O
noticing	O
all	O
the	O
subtle	O
environmental	O
clues	O
and	O
then	O
using	O
your	O
imagination	O
to	O
draw	O
the	O
connecting	O
dots.	O
"	O
</s>
<s>
Kieron	O
Gillen	O
from	O
Rock	O
,	O
Paper	O
,	O
Shotgun	O
considered	O
Gravity	B-Application
Bone	I-Application
to	O
be	O
an	O
intellectual	O
mix	O
of	O
Hitman	B-Application
,	O
No-one	B-Application
Lives	I-Application
Forever	I-Application
,	O
and	O
Team	B-Application
Fortress	I-Application
2	I-Application
,	O
stating	O
that	O
it	O
is	O
the	O
"	O
wittiest	O
game	O
"	O
he	O
has	O
played	O
since	O
World	B-Application
of	I-Application
Goo	I-Application
.	O
</s>
<s>
Gillen	O
applauded	O
every	O
aspect	O
of	O
the	O
game	O
,	O
stating	O
that	O
Gravity	B-Application
Bone	I-Application
was	O
an	O
"	O
indie	O
art	O
game	O
whose	O
main	O
effect	O
is	O
to	O
delight	O
you	O
at	O
every	O
turn.	O
"	O
</s>
<s>
A	O
sequel	O
to	O
Gravity	B-Application
Bone	I-Application
,	O
Thirty	B-Application
Flights	I-Application
of	I-Application
Loving	I-Application
,	O
was	O
announced	O
as	O
a	O
reward	O
for	O
contributing	O
to	O
the	O
Idle	O
Thumbs	O
podcast	O
revival	O
Kickstarter	O
.	O
</s>
<s>
The	O
game	O
was	O
released	O
to	O
Kickstarter	O
backers	O
in	O
July	O
2012	O
,	O
and	O
later	O
offered	O
as	O
a	O
purchasable	O
title	O
on	O
Steam	O
,	O
which	O
included	O
Gravity	B-Application
Bone	I-Application
as	O
an	O
additional	O
feature	O
.	O
</s>
<s>
The	O
game	O
,	O
though	O
not	O
a	O
direct	O
sequel	O
in	O
story	O
to	O
Gravity	B-Application
Bone	I-Application
,	O
follows	O
the	O
main	O
character	O
in	O
a	O
heist	O
with	O
two	O
other	O
characters	O
that	O
goes	O
very	O
wrong	O
.	O
</s>
