<s>
The	B-Application
Lab	I-Application
is	O
a	O
virtual	B-Application
reality	I-Application
(	O
VR	O
)	O
video	O
game	O
developed	O
by	O
Valve	O
and	O
released	O
for	O
Windows	O
on	O
April	O
5	O
,	O
2016	O
.	O
</s>
<s>
The	O
game	O
is	O
set	O
in	O
the	O
Portal	B-Application
universe	O
and	O
offers	O
eight	O
different	O
game	O
types	O
that	O
involve	O
short	O
demo	O
experiences	O
that	O
use	O
different	O
aspects	O
of	O
the	O
VR	O
capabilities	O
.	O
</s>
<s>
The	O
majority	O
of	O
movement	O
within	O
The	B-Application
Lab	I-Application
uses	O
full	O
3D	O
motion	O
via	O
the	O
HTC	O
Vive	O
tracking	O
system	O
and	O
two	O
hand-held	O
motion	B-Device
controllers	I-Device
(	O
or	O
an	O
attached	O
Steam	B-Device
controller	I-Device
)	O
.	O
</s>
<s>
The	O
motion	B-Device
controllers	I-Device
are	O
also	O
required	O
to	O
pick	O
up	O
and	O
handle	O
objects	O
in	O
the	O
game	O
world	O
,	O
including	O
a	O
bow	O
,	O
repair	O
tools	O
,	O
and	O
a	O
bowling	O
ball	O
,	O
along	O
with	O
acting	O
as	O
a	O
physical	O
object	O
in	O
the	O
virtual	B-Application
space	I-Application
for	O
minigames	O
involving	O
dodging	O
projectiles	O
.	O
</s>
<s>
There	O
are	O
eight	O
different	O
minigames	O
available	O
in	O
The	B-Application
Lab	I-Application
.	O
</s>
<s>
Compared	O
to	O
the	O
Angry	B-Application
Birds	I-Application
series	O
of	O
games	O
,	O
this	O
minigame	O
uses	O
a	O
calibration	O
machine	O
that	O
shoots	O
Personality	O
Cores	O
at	O
piles	O
of	O
debris	O
and	O
explosives	O
.	O
</s>
<s>
An	O
archery	O
based	O
game	O
,	O
the	O
two	O
motion	B-Device
controllers	I-Device
are	O
used	O
to	O
aim	O
and	O
fire	O
a	O
bow	O
,	O
with	O
one	O
controller	O
acting	O
as	O
the	O
bow	O
shaft	O
and	O
the	O
other	O
as	O
the	O
arrow	O
.	O
</s>
<s>
The	O
enemy	O
models	O
were	O
represented	O
by	O
black	O
figures	O
represented	O
in	O
Aperture	O
Science	O
ads	O
that	O
had	O
been	O
illustrated	O
in	O
both	O
Portal	B-Application
games	O
.	O
</s>
<s>
Described	O
as	O
a	O
bullet	O
hell	O
type	O
game	O
,	O
Xortex	O
involves	O
picking	O
up	O
a	O
spaceship	O
with	O
the	O
motion	B-Device
controllers	I-Device
and	O
moving	O
it	O
around	O
in	O
the	O
virtual	B-Application
space	I-Application
to	O
avoid	O
an	O
increasingly	O
difficult	O
barrage	O
of	O
projectiles	O
.	O
</s>
<s>
Additional	O
environments	O
can	O
be	O
reached	O
either	O
by	O
manipulating	O
the	O
plug	O
on	O
the	O
Postcard	O
notice	O
board	O
in	O
the	B-Application
Lab	I-Application
or	O
by	O
using	O
the	O
drop	O
down	O
menu	O
presented	O
on	O
the	O
mirror	O
screen	O
on	O
the	O
host	O
PC	O
.	O
</s>
<s>
It	O
features	O
a	O
human	O
player	O
inside	O
a	O
GLaDOS	O
testing	O
lab	O
where	O
they	O
are	O
tasked	O
with	O
repairing	O
the	O
robot	O
Atlas	O
from	O
Portal	B-Application
2	I-Application
.	O
</s>
<s>
In	O
contrast	O
with	O
the	O
other	O
minigames	O
,	O
which	O
were	O
made	O
using	O
the	O
Unity	B-Application
engine	I-Application
,	O
Robot	O
Repair	O
uses	O
Valve	O
's	O
own	O
Source	B-Operating_System
2	I-Operating_System
engine	O
.	O
</s>
<s>
Secret	O
Shop	O
puts	O
the	O
player	O
in	O
the	O
item	O
shop	O
from	O
Valve	O
's	O
multiplayer	O
online	O
battle	O
arena	O
(	O
MOBA	O
)	O
video	O
game	O
Dota	B-Application
2	I-Application
,	O
with	O
many	O
objects	O
from	O
the	O
game	O
to	O
interact	O
with	O
and	O
secrets	O
to	O
discover	O
.	O
</s>
<s>
As	O
Valve	O
's	O
new	O
game	O
engine	O
,	O
Source	B-Operating_System
2	I-Operating_System
,	O
was	O
still	O
in	O
development	O
,	O
they	O
built	O
most	O
of	O
The	B-Application
Lab	I-Application
using	O
a	O
third-party	O
engine	O
,	O
Unity	B-Application
.	O
</s>
<s>
Valve	O
showed	O
a	O
demo	O
of	O
The	B-Application
Lab	I-Application
at	O
the	O
2016	O
Game	O
Developers	O
Conference	O
.	O
</s>
