<s>
Shadowgrounds	B-Application
is	O
a	O
top-down	O
shooter	O
for	O
Microsoft	B-Application
Windows	I-Application
,	O
Linux	B-Application
and	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
,	O
developed	O
by	O
Frozenbyte	O
.	O
</s>
<s>
As	O
well	O
as	O
being	O
available	O
through	O
retail	O
stores	O
,	O
the	O
game	O
began	O
being	O
distributed	O
on	O
Valve	O
's	O
Steam	B-Application
on	O
May	O
8	O
,	O
2006	O
.	O
</s>
<s>
The	O
game	O
was	O
also	O
available	O
on	O
Gametap	B-Operating_System
as	O
of	O
January	O
31	O
,	O
2008	O
until	O
its	O
close	O
,	O
and	O
is	O
on	O
Good	O
Old	O
Games	O
as	O
of	O
March	O
3	O
,	O
2011	O
.	O
</s>
<s>
The	O
game	O
was	O
later	O
ported	O
by	O
IGIOS	O
and	O
published	O
to	O
Linux	B-Application
by	O
Linux	B-Application
Game	O
Publishing	O
,	O
with	O
the	O
Linux	B-Application
version	O
being	O
released	O
on	O
September	O
16	O
,	O
2009	O
.	O
</s>
<s>
It	O
was	O
made	O
available	O
on	O
Desura	B-Language
on	O
April	O
10	O
,	O
2011	O
.	O
</s>
<s>
A	O
sequel	O
,	O
Shadowgrounds	B-Application
:	I-Application
Survivor	I-Application
,	O
was	O
released	O
in	O
2007	O
and	O
focuses	O
on	O
three	O
separate	O
characters	O
trying	O
to	O
survive	O
the	O
alien	O
onslaught	O
shown	O
in	O
the	O
first	O
game	O
.	O
</s>
<s>
Both	O
games	O
were	O
later	O
released	O
together	O
along	O
with	O
two	O
other	O
Frozenbyte	O
titles	O
,	O
Trine	B-Application
and	O
Splot	O
,	O
to	O
form	O
the	O
third	O
Humble	O
Indie	O
Bundle	O
.	O
</s>
<s>
The	O
game	O
is	O
a	O
fast-paced	O
top-down	O
shooter	O
reminiscent	O
of	O
the	O
Alien	B-Application
Breed	I-Application
series	O
.	O
</s>
<s>
Like	O
the	O
earlier	O
Finnish	O
game	O
Death	B-Application
Rally	I-Application
,	O
Shadowgrounds	B-Application
presents	O
a	O
familiar	O
concept	O
with	O
modern	O
resources	O
.	O
</s>
<s>
Shadowgrounds	B-Application
uses	O
light	O
and	O
darkness	O
as	O
vital	O
components	O
of	O
gameplay	O
and	O
atmosphere	O
,	O
hence	O
the	O
name	O
.	O
</s>
<s>
Finally	O
,	O
there	O
are	O
PDAs	B-Application
and	O
computer	O
terminals	O
scattered	O
through	O
the	O
maps	O
that	O
serve	O
to	O
loosely	O
advance	O
the	O
plot	O
with	O
some	O
optional	O
exposition	O
.	O
</s>
<s>
There	O
is	O
no	O
Internet	O
or	O
LAN	B-General_Concept
support	O
.	O
</s>
<s>
The	O
missiles	O
fail	O
to	O
launch	O
,	O
being	O
engulfed	O
on	O
the	O
launch	B-Operating_System
pad	I-Operating_System
.	O
</s>
<s>
Frozenbyte	O
has	O
released	O
extensive	O
documentation	O
on	O
how	O
to	O
make	O
modifications	O
on	O
the	O
Shadowgrounds	B-Application
engine	O
,	O
as	O
well	O
as	O
how	O
to	O
make	O
custom	O
maps	O
and	O
scenarios	O
.	O
</s>
<s>
While	O
the	O
first	O
version	O
of	O
the	O
official	O
Level	O
Editor	O
,	O
released	O
on	O
29	O
June	O
2006	O
,	O
was	O
only	O
for	O
retail	O
versions	O
of	O
the	O
game	O
,	O
users	O
who	O
purchased	O
the	O
game	O
via	O
Steam	B-Application
received	O
access	O
to	O
the	O
editor	O
on	O
13	O
July	O
2006	O
.	O
</s>
<s>
With	O
that	O
release	O
,	O
all	O
of	O
the	O
filesystem	O
for	O
the	O
Editor	O
was	O
moved	O
onto	O
the	O
Steam	B-Application
platform	O
.	O
</s>
<s>
After	O
the	O
game	O
was	O
included	O
as	O
part	O
of	O
the	O
third	O
Humble	O
Indie	O
Bundle	O
,	O
the	O
Shadowgrounds	B-Application
and	O
Shadowgrounds	B-Application
:	I-Application
Survivor	I-Application
source	O
code	O
(	O
but	O
not	O
their	O
graphics	O
or	O
level	O
editor	O
)	O
was	O
publicly	O
released	O
.	O
</s>
<s>
Shadowgrounds	B-Application
received	O
mixed	O
but	O
generally	O
positive	O
reviews	O
,	O
holding	O
a	O
MobyGames	B-Application
rank	O
of	O
73	O
,	O
Metacritic	O
score	O
of	O
74	O
,	O
and	O
a	O
GameRankings	O
rank	O
of	O
75.60	O
%	O
.	O
</s>
<s>
Reaction	O
to	O
the	O
game	O
's	O
atmosphere	O
was	O
mixed	O
,	O
with	O
some	O
reviewers	O
finding	O
the	O
game	O
genuinely	O
frightening	O
,	O
while	O
others	O
found	O
it	O
unimpressive	O
or	O
found	O
its	O
presentation	O
simply	O
not	O
as	O
competent	O
or	O
successful	O
as	O
it	O
was	O
implemented	O
in	O
similar	O
games	O
such	O
as	O
the	O
Doom	B-Application
series	I-Application
,	O
to	O
which	O
Shadowgrounds	B-Application
was	O
often	O
compared	O
.	O
</s>
<s>
The	O
game	O
's	O
music	O
and	O
sound	O
effects	O
were	O
praised	O
;	O
Lordi	O
guitarist	O
Amen	O
played	O
guitar	O
on	O
the	O
official	O
Shadowgrounds	B-Application
soundtrack	O
,	O
which	O
was	O
composed	O
by	O
Ari	O
Pulkkinen	O
.	O
</s>
<s>
GamingOnLinux	O
reviewer	O
Hamish	O
Paul	O
Wilson	O
gave	O
the	O
game	O
7.5/10	O
,	O
commenting	O
that	O
"	O
despite	O
its	O
faults	O
,	O
Shadowgrounds	B-Application
remains	O
an	O
admirable	O
action	O
romp	O
with	O
enough	O
attractive	O
elements	O
to	O
make	O
it	O
worthy	O
of	O
a	O
measured	O
recommendation.	O
"	O
</s>
