<s>
Pixel	B-Application
Force	I-Application
:	I-Application
Left	I-Application
4	I-Application
Dead	I-Application
is	O
a	O
fan-made	O
,	O
8-bit-styled	O
demake	O
of	O
Valve	O
's	O
2008	O
first-person	O
shooter	O
game	O
Left	B-Application
4	I-Application
Dead	I-Application
.	O
</s>
<s>
It	O
was	O
developed	O
by	O
indie	O
developer	O
Eric	B-Application
Ruth	I-Application
Games	I-Application
and	O
released	O
as	O
freeware	B-License
on	O
January	O
4	O
,	O
2010	O
.	O
</s>
<s>
It	O
was	O
designer	O
Eric	O
Ruth	O
's	O
first	O
attempt	O
at	O
an	O
8-bit	O
demake	O
,	O
with	O
the	O
most	O
difficult	O
part	O
for	O
Ruth	O
being	O
the	O
music	O
composition	O
due	O
to	O
Left	B-Application
4	I-Application
Deads	I-Application
soundtrack	O
depth	O
and	O
the	O
limited	O
audio	O
that	O
Ruth	O
could	O
work	O
with	O
.	O
</s>
<s>
Pixel	B-Application
Force	I-Application
:	I-Application
Left	I-Application
4	I-Application
Dead	I-Application
allows	O
players	O
to	O
control	O
one	O
or	O
more	O
of	O
four	O
survivors	O
.	O
</s>
<s>
It	O
is	O
an	O
overhead	O
shooter	O
,	O
similar	O
to	O
NES	O
games	O
Ikari	B-Application
Warriors	I-Application
and	O
Fester	B-Application
's	I-Application
Quest	I-Application
.	O
</s>
<s>
It	O
was	O
the	O
first	O
of	O
the	O
Pixel	B-Application
Force	I-Application
series	O
,	O
followed	O
by	O
Pixel	B-Application
Force	I-Application
:	O
Halo	O
and	O
Pixel	B-Application
Force	I-Application
:	O
DJ	O
Hero	O
.	O
</s>
<s>
The	O
trailer	O
was	O
the	O
target	O
of	O
mostly	O
positive	O
reception	O
,	O
though	O
the	O
post-release	O
reception	O
was	O
more	O
positive	O
,	O
with	O
Left	B-Application
4	I-Application
Deads	I-Application
publisher	O
Valve	O
calling	O
the	O
idea	O
behind	O
it	O
"	O
hilarious	O
"	O
.	O
</s>
<s>
Ruth	O
was	O
praised	O
for	O
his	O
ability	O
to	O
demake	O
Left	B-Application
4	I-Application
Dead	I-Application
into	O
a	O
Nintendo	O
Entertainment	O
System-style	O
video	O
game	O
.	O
</s>
<s>
Pixel	B-Application
Force	I-Application
:	I-Application
Left	I-Application
4	I-Application
Dead	I-Application
is	O
based	O
on	O
the	O
Valve	O
game	O
Left	B-Application
4	I-Application
Dead	I-Application
,	O
which	O
is	O
a	O
first-person	O
shooter	O
,	O
while	O
the	O
Pixel	B-Application
Force	I-Application
demake	O
is	O
a	O
top-down	O
shooter	O
.	O
</s>
<s>
Pixel	B-Application
Force	I-Application
:	I-Application
Left	I-Application
4	I-Application
Dead	I-Application
was	O
developed	O
by	O
independent	O
video	O
game	O
designer	O
Eric	O
Ruth	O
under	O
Eric	B-Application
Ruth	I-Application
Games	I-Application
.	O
</s>
<s>
It	O
was	O
his	O
first	O
attempt	O
at	O
creating	O
an	O
8-bit-styled	O
remake	O
of	O
a	O
previously	O
existing	O
title	O
,	O
regarding	O
Left	B-Application
4	I-Application
Dead	I-Application
as	O
a	O
game	O
he	O
cherished	O
.	O
</s>
<s>
The	O
idea	O
of	O
making	O
an	O
8-bit	O
remake	O
of	O
Left	B-Application
4	I-Application
Dead	I-Application
originally	O
took	O
form	O
when	O
he	O
suggested	O
to	O
his	O
friend	O
the	O
idea	O
of	O
remaking	O
Left	B-Application
4	I-Application
Dead	I-Application
as	O
a	O
Nintendo	O
Entertainment	O
System	O
(	O
NES	O
)	O
game	O
to	O
his	O
friend	O
,	O
who	O
liked	O
the	O
idea	O
.	O
</s>
<s>
While	O
developing	O
another	O
game	O
called	O
Mean	O
Kathleen	O
and	O
the	O
Great	O
Quack	O
Machine	O
,	O
he	O
began	O
working	O
on	O
sprites	O
for	O
the	O
four	O
survivors	O
and	O
special	O
infected	O
from	O
Left	B-Application
4	I-Application
Dead	I-Application
for	O
fun	O
.	O
</s>
<s>
The	O
composition	O
of	O
the	O
music	O
was	O
the	O
most	O
difficult	O
part	O
of	O
the	O
game	O
's	O
development	O
for	O
him	O
,	O
due	O
to	O
Valve	O
's	O
Left	B-Application
4	I-Application
Deads	I-Application
composition	O
,	O
citing	O
"	O
heavy	O
string	O
sections	O
,	O
brass	O
,	O
digital	O
choruses	O
,	O
and	O
more	O
"	O
.	O
</s>
<s>
Despite	O
Left	B-Application
4	I-Application
Deads	I-Application
four-player	O
support	O
,	O
the	O
Pixel	B-Application
Force	I-Application
version	O
only	O
has	O
two-player	O
support	O
for	O
technical	O
reasons	O
.	O
</s>
<s>
Ruth	O
also	O
had	O
to	O
cut	O
the	O
Survivor	O
and	O
Versus	O
modes	O
from	O
the	O
original	O
Left	B-Application
4	I-Application
Dead	I-Application
,	O
along	O
with	O
some	O
of	O
the	O
weapons	O
.	O
</s>
<s>
The	O
game	O
was	O
released	O
on	O
January	O
4	O
,	O
2010	O
,	O
for	O
Microsoft	B-Application
Windows	I-Application
.	O
</s>
<s>
Pixel	B-Application
Force	I-Application
:	I-Application
Left	I-Application
4	I-Application
Dead	I-Application
started	O
a	O
series	O
of	O
fan-made	O
retro	O
game	O
demakes	O
of	O
newer	O
games	O
under	O
the	O
Pixel	B-Application
Force	I-Application
label	O
,	O
followed	O
by	O
Pixel	B-Application
Force	I-Application
:	O
DJ	O
Hero	O
and	O
Pixel	B-Application
Force	I-Application
:	O
Halo	O
.	O
</s>
<s>
A	O
Pixel	B-Application
Force	I-Application
demake	O
of	O
the	O
video	O
game	O
Psychonauts	B-Application
was	O
considered	O
.	O
</s>
<s>
Before	O
its	O
release	O
,	O
Pixel	B-Application
Force	I-Application
:	I-Application
Left	I-Application
4	I-Application
Dead	I-Application
received	O
mostly	O
reception	O
for	O
its	O
trailers	O
.	O
</s>
<s>
GameSpy	O
writer	O
Tyler	O
Barber	O
thought	O
it	O
was	O
cute	O
,	O
though	O
felt	O
that	O
a	O
fast-paced	O
action	O
game	O
like	O
Robotron	B-Application
2084	I-Application
would	O
fit	O
Left	B-Application
4	I-Application
Dead	I-Application
better	O
.	O
</s>
<s>
Destructoid	O
writer	O
Jonathan	O
Holmes	O
called	O
it	O
"	O
pretty	O
fun	O
"	O
,	O
comparing	O
its	O
play	O
style	O
to	O
NES	O
games	O
Fester	B-Application
's	I-Application
Quest	I-Application
and	O
Ikari	B-Application
Warriors	I-Application
.	O
</s>
<s>
Eurogamer	O
writer	O
Tom	O
Bramwell	O
felt	O
it	O
was	O
worth	O
it	O
for	O
its	O
"	O
cutesy	O
"	O
take	O
on	O
Left	B-Application
4	I-Application
Dead	I-Application
.	O
</s>
