<s>
It	O
was	O
released	O
for	O
the	B-Operating_System
Xbox	I-Operating_System
360	I-Operating_System
in	O
Japan	O
on	O
January	O
25	O
,	O
2007	O
,	O
and	O
in	O
North	O
America	O
on	O
July	O
3	O
,	O
2007	O
.	O
</s>
<s>
The	O
game	O
was	O
later	O
ported	O
to	O
the	O
PlayStation	B-Operating_System
3	I-Operating_System
in	O
2008	O
under	O
the	O
title	O
.	O
</s>
<s>
It	O
received	O
negative	O
reviews	O
for	O
its	O
difficulty	O
,	O
poor	O
artificial	B-Application
intelligence	I-Application
,	O
and	O
controls	O
.	O
</s>
<s>
Vampires	B-Application
,	O
known	O
as	O
"	O
nightwalkers	O
"	O
,	O
were	O
found	O
to	O
be	O
responsible	O
for	O
the	O
disappearances	O
of	O
civilians	O
in	O
the	O
United	O
States	O
and	O
in	O
other	O
countries	O
.	O
</s>
<s>
Lloyd	O
defeats	O
all	O
the	O
hybrids	O
and	O
vampires	B-Application
in	O
his	O
way	O
,	O
eventually	O
meeting	O
with	O
the	O
leader	O
of	O
the	O
vampires	B-Application
in	O
an	O
attempt	O
to	O
keep	O
the	O
peace	O
.	O
</s>
<s>
It	O
turns	O
out	O
the	O
head	O
vampire	B-Application
was	O
n't	O
really	O
the	O
true	O
leader	O
of	O
nightwalkers	O
in	O
the	O
city	O
,	O
as	O
he	O
was	O
advised	O
by	O
two	O
nightwalkers	O
who	O
were	O
naturally	O
born	O
as	O
vampires	B-Application
and	O
can	O
survive	O
in	O
the	O
daytime	O
.	O
</s>
<s>
Vampire	B-Application
Rain	I-Application
is	O
a	O
stealth	O
game	O
similar	O
in	O
nature	O
to	O
the	O
Splinter	B-Application
Cell	I-Application
or	O
Metal	B-Application
Gear	I-Application
series	I-Application
.	O
</s>
<s>
Players	O
are	O
tasked	O
with	O
navigating	O
their	O
character	O
through	O
city	O
streets	O
,	O
while	O
avoiding	O
the	O
vampire	B-Application
enemies	O
that	O
patrol	O
the	O
streets	O
disguised	O
as	O
ordinary	O
human	O
citizens	O
.	O
</s>
<s>
Unlike	O
most	O
stealth-action	O
games	O
,	O
Vampire	B-Application
Rain	I-Application
places	O
heavy	O
emphasis	O
on	O
pure	O
stealth	O
.	O
</s>
<s>
Enemies	O
are	O
extremely	O
fast	O
and	O
can	O
kill	O
the	O
player	O
in	O
two	O
hits	O
;	O
the	O
first	O
hit	O
usually	O
immobilizes	O
the	O
player	O
,	O
giving	O
the	O
vampire	B-Application
sufficient	O
time	O
to	O
land	O
a	O
second	O
,	O
killing	O
blow	O
.	O
</s>
<s>
Additionally	O
,	O
for	O
the	O
first	O
third	O
of	O
the	O
game	O
,	O
players	O
lack	O
any	O
weaponry	O
that	O
can	O
kill	O
vampires	B-Application
effectively	O
without	O
spending	O
a	O
large	O
amount	O
of	O
ammunition	O
.	O
</s>
<s>
Later	O
in	O
the	O
game	O
,	O
players	O
are	O
given	O
high-powered	O
weapons	O
which	O
prove	O
more	O
effective	O
against	O
the	O
game	O
's	O
vampire	B-Application
enemies	O
.	O
</s>
<s>
Online	B-Application
multiplayer	I-Application
involves	O
up	O
to	O
eight	O
players	O
in	O
standard	O
modes	O
such	O
as	O
deathmatch	O
,	O
team	O
deathmatch	O
and	O
capture	B-Application
the	I-Application
flag	I-Application
,	O
as	O
well	O
as	O
the	O
unique	O
mode	O
which	O
allows	O
one	O
to	O
become	O
a	O
nightwalker	O
and	O
fight	O
opponents	O
with	O
extreme	O
speed	O
and	O
power	O
.	O
</s>
<s>
The	O
game	O
received	O
"	O
unfavorable	O
"	O
reviews	O
on	O
both	O
platforms	O
according	O
to	O
the	O
review	B-Application
aggregation	I-Application
website	O
Metacritic	O
.	O
</s>
<s>
The	O
reviews	O
criticized	O
Vampire	B-Application
Rains	I-Application
enemy	O
AI	B-Application
,	O
controls	O
,	O
health	O
meters	O
for	O
both	O
the	O
protagonist	O
and	O
enemies	O
,	O
and	O
multiplayer	O
modes	O
.	O
</s>
<s>
The	O
game	O
was	O
also	O
criticized	O
for	O
having	O
elements	O
derived	O
from	O
Metal	B-Application
Gear	I-Application
Solid	I-Application
and	O
Splinter	B-Application
Cell	I-Application
but	O
with	O
much	O
less	O
appeal	O
.	O
</s>
<s>
Vampire	B-Application
Rain	I-Application
:	I-Application
Altered	I-Application
Species	I-Application
was	O
also	O
poorly	O
received	O
.	O
</s>
<s>
A	O
GameSpot	O
review	O
admonished	O
the	O
updated	O
PS3	B-Operating_System
version	O
for	O
not	O
undergoing	O
major	O
changes	O
from	O
the	B-Operating_System
Xbox	I-Operating_System
360	I-Operating_System
version	O
.	O
</s>
<s>
In	O
Japan	O
,	O
however	O
,	O
the	B-Operating_System
Xbox	I-Operating_System
360	I-Operating_System
version	O
was	O
better	O
received	O
,	O
with	O
Famitsu	O
and	O
Famitsu	O
X360	B-Operating_System
each	O
granting	O
it	O
a	O
score	O
of	O
30	O
out	O
of	O
40	O
.	O
</s>
