<s>
is	O
a	O
3D	B-General_Concept
augmented	I-General_Concept
reality	I-General_Concept
shooter	O
video	O
game	O
developed	O
by	O
HAL	O
Laboratory	O
and	O
published	O
by	O
Nintendo	O
.	O
</s>
<s>
It	O
was	O
released	O
as	O
preloaded	O
software	O
on	O
all	O
systems	O
in	O
the	O
Nintendo	B-Operating_System
3DS	I-Operating_System
line	I-Operating_System
of	O
hardware	O
,	O
and	O
was	O
first	O
released	O
in	O
2011	O
.	O
</s>
<s>
Face	B-Device
Raiders	I-Device
is	O
a	O
single	O
player	O
,	O
augmented	B-General_Concept
reality	I-General_Concept
,	O
shooter	O
game	O
that	O
uses	O
the	O
handheld	B-Application
's	O
gyroscopic	O
controls	O
and	O
cameras	O
.	O
</s>
<s>
It	O
was	O
first	O
released	O
with	O
the	O
Nintendo	B-Operating_System
3DS	I-Operating_System
and	O
has	O
been	O
preloaded	O
on	O
all	O
devices	O
in	O
the	O
family	O
.	O
</s>
<s>
There	O
are	O
butterflies	B-Application
which	O
can	O
be	O
hit	O
in	O
order	O
to	O
refill	O
health	O
and	O
bombs	B-Device
to	O
collect	O
to	O
be	O
used	O
to	O
destroy	O
all	O
enemies	O
in	O
one	O
shoot	O
screen	O
.	O
</s>
<s>
The	O
game	O
was	O
developed	O
by	O
HAL	O
Laboratory	O
alongside	O
other	O
built	O
in	O
software	O
for	O
the	O
Nintendo	B-Operating_System
3DS	I-Operating_System
.	O
</s>
<s>
At	O
the	O
end	O
of	O
development	O
,	O
HAL	O
added	O
a	O
feature	O
where	O
you	O
could	O
point	O
the	O
outer	O
camera	O
of	O
the	O
3DS	B-Operating_System
at	O
someone	O
,	O
and	O
their	O
face	O
would	O
become	O
an	O
enemy	O
in	O
the	O
game	O
.	O
</s>
<s>
The	O
game	O
's	O
AR	O
features	O
were	O
created	O
with	O
the	O
Nintendo	B-Operating_System
3DS	I-Operating_System
Camera	O
Team	O
.	O
</s>
<s>
Prior	O
to	O
release	O
with	O
the	O
3DS	B-Operating_System
,	O
Face	B-Device
Raiders	I-Device
received	O
generally	O
positive	O
feedback	O
when	O
it	O
was	O
shown	O
at	O
E3	O
as	O
a	O
tech	O
demo	O
with	O
blocks	O
instead	O
of	O
faces	O
.	O
</s>
<s>
The	O
point-and-shoot	B-Algorithm
gameplay	O
with	O
gyroscopic	O
controls	O
was	O
said	O
to	O
be	O
novel	O
and	O
easy	O
to	O
use	O
.	O
</s>
<s>
The	O
free	O
price	O
was	O
also	O
cited	O
as	O
a	O
positive	O
aspect	O
of	O
the	O
game	O
,	O
though	O
some	O
noted	O
that	O
it	O
would	O
be	O
worth	O
an	O
eShop	B-Application
purchase	O
if	O
it	O
had	O
instead	O
been	O
offered	O
there	O
.	O
</s>
<s>
Reviewers	O
also	O
felt	O
that	O
the	O
3D	B-Algorithm
effect	O
could	O
be	O
compromised	O
by	O
using	O
the	O
motion	O
controls	O
.	O
</s>
<s>
The	O
game	O
was	O
also	O
seen	O
as	O
a	O
good	O
way	O
to	O
showcase	O
the	O
features	O
of	O
the	O
3DS	B-Operating_System
to	O
unfamiliar	O
audiences	O
.	O
</s>
