<s>
Penumbra	B-Application
:	I-Application
Overture	I-Application
is	O
the	O
first	O
in	O
a	O
series	O
of	O
episodic	O
survival	O
horror	O
games	O
developed	O
by	O
Frictional	O
Games	O
.	O
</s>
<s>
With	O
the	O
announcement	O
of	O
the	O
second	O
episode	O
,	O
Penumbra	B-Application
:	I-Application
Black	I-Application
Plague	I-Application
,	O
it	O
was	O
stated	O
that	O
the	O
second	O
game	O
would	O
be	O
the	O
final	O
chapter	O
.	O
</s>
<s>
However	O
,	O
an	O
expansion	O
has	O
been	O
released	O
since	O
then	O
:	O
Penumbra	B-Application
:	I-Application
Requiem	I-Application
,	O
technically	O
giving	O
the	O
series	O
a	O
third	O
chapter	O
.	O
</s>
<s>
Although	O
Frictional	O
Games	O
describes	O
Penumbra	B-Application
:	I-Application
Overture	I-Application
as	O
a	O
first-person	O
adventure	O
,	O
the	O
game	O
blends	O
the	O
genres	O
of	O
survival	O
horror	O
,	O
psychological	O
horror	O
,	O
and	O
adventure	O
.	O
</s>
<s>
The	O
use	O
of	O
the	O
Newton	B-Application
Game	I-Application
Dynamics	I-Application
physics	O
engine	O
emphasizes	O
physics-based	O
puzzles	O
as	O
well	O
as	O
physics-based	O
combat	O
.	O
</s>
<s>
There	O
are	O
no	O
firearms	O
in	O
the	O
game	O
,	O
so	O
during	O
combat	O
the	O
player	O
is	O
limited	O
to	O
improvised	O
melee	O
fighting	O
with	O
a	O
hammer	B-Application
or	O
pickaxe	O
,	O
or	O
throwing	O
objects	O
at	O
attacking	O
creatures	O
.	O
</s>
<s>
The	O
player	O
also	O
has	O
access	O
to	O
a	O
notebook	B-Device
where	O
important	O
information	O
and	O
the	O
players	O
goals	O
and	O
objectives	O
are	O
recorded	O
.	O
</s>
<s>
Set	O
in	O
the	O
year	O
2001	O
,	O
Penumbra	B-Application
:	I-Application
Overture	I-Application
follows	O
the	O
story	O
of	O
Philip	O
,	O
a	O
thirty-year-old	O
physicist	O
whose	O
mother	O
has	O
recently	O
died	O
.	O
</s>
<s>
Penumbra	B-Application
:	I-Application
Overture	I-Application
is	O
based	O
on	O
Frictional	O
Games	O
 '	O
earlier	O
game	O
Penumbra	O
,	O
a	O
short	O
tech	O
demo	O
meant	O
to	O
demonstrate	O
the	O
capabilities	O
of	O
the	O
company	O
's	O
HPL	O
Engine	O
1	O
.	O
</s>
<s>
On	O
30	O
May	O
,	O
the	O
full	O
version	O
for	O
Linux	B-Application
was	O
released	O
on	O
the	O
Frictional	O
Games	O
store	O
.	O
</s>
<s>
In	O
addition	O
,	O
the	O
game	O
became	O
available	O
on	O
GameTap	B-Operating_System
on	O
4	O
October	O
.	O
</s>
<s>
On	O
10	O
January	O
2008	O
,	O
the	O
full	O
version	O
for	O
Mac	B-Application
OS	I-Application
X	I-Application
was	O
released	O
on	O
the	O
Frictional	O
Games	O
forum	O
for	O
PowerPC	O
and	O
Intel	O
architectures	O
.	O
</s>
<s>
In	O
March	O
2009	O
,	O
Paradox	O
Interactive	O
released	O
Penumbra	B-Application
Overture	I-Application
in	O
a	O
collection	O
pack	O
along	O
with	O
Penumbra	B-Application
:	I-Application
Black	I-Application
Plague	I-Application
and	O
Penumbra	B-Application
:	I-Application
Requiem	I-Application
.	O
</s>
<s>
The	O
game	O
became	O
available	O
via	O
Steam	B-Application
on	O
7	O
March	O
.	O
</s>
<s>
Overture	O
was	O
released	O
as	O
part	O
of	O
the	O
Humble	O
Indie	O
Bundle	O
,	O
and	O
when	O
the	O
Bundle	O
made	O
more	O
than	O
$1million	O
,	O
Overture	O
's	O
source	O
code	O
was	O
released	O
under	O
the	O
GNU	B-License
GPL-3.0-or-later	I-License
.	O
</s>
<s>
The	O
game	O
received	O
"	O
average	O
"	O
reviews	O
according	O
to	O
the	O
review	B-Application
aggregation	I-Application
website	O
Metacritic	O
.	O
</s>
<s>
Many	O
of	O
the	O
criticisms	O
directed	O
at	O
Overture	O
were	O
taken	O
into	O
consideration	O
during	O
the	O
development	O
of	O
the	O
next	O
episode	O
Penumbra	B-Application
:	I-Application
Black	I-Application
Plague	I-Application
.	O
</s>
<s>
Black	O
Plague	O
received	O
slightly	O
more	O
positive	O
reviews	O
from	O
critics	O
,	O
and	O
its	O
design	O
was	O
for	O
the	O
most	O
part	O
mirrored	O
with	O
only	O
a	O
few	O
additions	O
by	O
Frictional	O
's	O
critically	O
acclaimed	O
2010	O
spiritual	O
successor	O
to	O
the	O
series	O
,	O
Amnesia	B-Application
:	I-Application
The	I-Application
Dark	I-Application
Descent	I-Application
.	O
</s>
