<s>
Aperture	B-Application
Tag	I-Application
:	I-Application
The	I-Application
Paint	I-Application
Gun	I-Application
Testing	I-Application
Initiative	I-Application
is	O
a	O
2014	O
puzzle-platform	O
game	O
developed	O
by	O
the	O
Aperture	B-Application
Tag	I-Application
Team	O
.	O
</s>
<s>
Originally	O
made	O
as	O
a	O
mod	O
of	O
Valve	O
's	O
Portal	B-Application
series	O
,	O
it	O
was	O
released	O
on	O
July	O
15	O
,	O
2014	O
.	O
</s>
<s>
The	O
game	O
removes	O
the	O
iconic	O
portal	B-Application
gun	O
of	O
the	O
series	O
and	O
instead	O
utilizes	O
a	O
newly	O
created	O
paint	O
gun	O
that	O
fires	O
two	O
kinds	O
of	O
gel	O
with	O
different	O
properties	O
.	O
</s>
<s>
Both	O
gels	O
were	O
featured	O
in	O
Portal	B-Application
2	I-Application
,	O
with	O
the	O
blue	O
providing	O
a	O
jump	O
boost	O
and	O
bouncing	O
pad	O
and	O
the	O
orange	O
gel	O
providing	O
a	O
speed	O
boost	O
.	O
</s>
<s>
Unlike	O
the	O
stationary	O
locations	O
of	O
gel	O
in	O
Portal	B-Application
2	I-Application
,	O
however	O
,	O
the	O
paint	O
gun	O
allows	O
the	O
player	O
to	O
apply	O
the	O
gels	O
to	O
paint-enabled	O
surfaces	O
through	O
the	O
levels	O
.	O
</s>
<s>
The	O
game	O
also	O
takes	O
advantage	O
of	O
a	O
cut	O
part	O
of	O
the	O
Portal	B-Application
series	O
in	O
Pneumatic	O
Diversity	O
vents/tubes	O
,	O
which	O
were	O
featured	O
in	O
early	O
trailers	O
for	O
Portal	B-Application
2	I-Application
.	O
</s>
<s>
They	O
are	O
used	O
in	O
Aperture	B-Application
Tag	I-Application
to	O
move	O
the	O
player	O
from	O
level	O
to	O
level	O
in	O
order	O
to	O
make	O
the	O
transitions	O
faster	O
.	O
</s>
<s>
Eugenio	O
Roman	O
,	O
the	O
original	O
organizer	O
of	O
the	O
Aperture	B-Application
Tag	I-Application
Team	O
,	O
first	O
began	O
considering	O
paint	O
gun	O
and	O
gel	O
concepts	O
before	O
the	O
Portal	B-Application
2	I-Application
game	O
was	O
released	O
and	O
when	O
the	O
gel	O
components	O
of	O
the	O
game	O
were	O
announced	O
.	O
</s>
<s>
It	O
was	O
stated	O
that	O
the	O
concept	O
of	O
paint	O
for	O
Portal	B-Application
2	I-Application
was	O
first	O
derived	O
from	O
the	O
game	O
Tag	B-Application
:	I-Application
The	I-Application
Power	I-Application
of	I-Application
Paint	I-Application
,	O
whose	O
team	O
was	O
hired	O
to	O
work	O
on	O
the	O
paint	O
aspects	O
of	O
Portal	B-Application
2	I-Application
.	O
</s>
<s>
The	O
paint	O
gun	O
he	O
ended	O
up	O
using	O
for	O
Aperture	B-Application
Tag	I-Application
was	O
developed	O
by	O
another	O
modder	O
in	O
the	O
community	O
.	O
</s>
<s>
After	O
attending	O
a	O
Valve-hosted	O
closed	O
beta	O
for	O
the	O
Perpetual	O
Testing	O
Initiative	O
,	O
Roman	O
asked	O
the	O
employees	O
if	O
a	O
paint	O
gun	O
add-on	O
was	O
going	O
to	O
be	O
developed	O
for	O
Portal	B-Application
2	I-Application
so	O
that	O
it	O
could	O
be	O
used	O
in	O
community	O
made	O
maps	O
.	O
</s>
<s>
Roman	O
paid	O
a	O
visit	O
to	O
Valve	O
in	O
May	O
2013	O
and	O
decided	O
afterward	O
to	O
make	O
Aperture	B-Application
Tag	I-Application
a	O
full	O
modification	O
release	O
and	O
not	O
just	O
a	O
series	O
of	O
episodic	O
maps	O
.	O
</s>
<s>
Many	O
of	O
the	O
tracks	O
are	O
remixes	O
of	O
tracks	O
in	O
the	O
soundtrack	O
of	O
Portal	B-Application
2	I-Application
.	O
</s>
