<s>
Portal	B-Application
Stories	I-Application
:	I-Application
Mel	I-Application
is	O
a	O
single-player	O
mod	O
for	O
Portal	B-Application
2	I-Application
developed	O
by	O
Prism	O
Studios	O
.	O
</s>
<s>
The	O
mod	O
was	O
released	O
on	O
June	O
25	O
,	O
2015	O
,	O
for	O
Microsoft	B-Application
Windows	I-Application
,	O
and	O
OS	B-Operating_System
X	I-Operating_System
systems	O
,	O
available	O
freely	O
to	O
users	O
who	O
own	O
Portal	B-Application
2	I-Application
on	O
Steam	B-Application
.	O
</s>
<s>
Like	O
the	O
official	O
Portal	B-Application
games	I-Application
,	O
it	O
is	O
a	O
puzzle-platform	O
game	O
that	O
involves	O
placing	O
interconnected	O
"	O
portals	B-Application
"	O
to	O
solve	O
puzzles	O
.	O
</s>
<s>
Set	O
in	O
the	O
Portal	B-Application
universe	O
,	O
players	O
control	O
the	O
test	O
subject	O
Mel	O
,	O
who	O
has	O
to	O
escape	O
an	O
underground	O
facility	O
after	O
she	O
spends	O
decades	O
in	O
artificial	O
hibernation	O
.	O
</s>
<s>
Like	O
Portal	B-Application
2	I-Application
,	O
Portal	B-Application
Stories	I-Application
:	I-Application
Mel	I-Application
is	O
a	O
puzzle-platform	O
game	O
played	O
from	O
the	O
first-person	O
perspective	O
as	O
the	O
player	O
character	O
Mel	O
.	O
</s>
<s>
Featuring	O
the	O
same	O
mechanics	O
as	O
the	O
original	O
game	O
,	O
the	O
player	O
solves	O
puzzles	O
with	O
a	O
prototype	O
"	O
portal	B-Application
gun	O
"	O
,	O
which	O
allows	O
them	O
to	O
create	O
a	O
connected	O
opening	O
on	O
two	O
different	O
flat	O
planes	O
.	O
</s>
<s>
Portals	B-Application
can	O
only	O
be	O
placed	O
on	O
certain	O
surfaces	O
,	O
and	O
portal	B-Application
shooting	O
can	O
be	O
blocked	O
via	O
electric	O
barriers	O
.	O
</s>
<s>
Based	O
in	O
the	O
same	O
universe	O
as	O
the	O
official	O
Portal	B-Application
games	I-Application
,	O
the	O
story	O
is	O
initially	O
set	O
in	O
1952	O
,	O
when	O
Aperture	O
Science	O
is	O
still	O
a	O
fledgling	O
company	O
.	O
</s>
<s>
Awakening	O
in	O
the	O
distant	O
future	O
,	O
Mel	O
follows	O
what	O
seems	O
to	O
be	O
the	O
voice	O
of	O
Cave	O
Johnson	O
and	O
obtains	O
a	O
portal	B-Application
gun	O
.	O
</s>
<s>
Virgil	O
guides	O
Mel	O
through	O
the	O
remnants	O
of	O
the	O
old	O
facility	O
,	O
explaining	O
that	O
the	O
destruction	O
of	O
GLaDOS	O
in	O
Portal	B-Application
caused	O
most	O
of	O
the	O
control	O
systems	O
in	O
the	O
facility	O
to	O
falter	O
.	O
</s>
<s>
Mel	O
surrenders	O
her	O
portal	B-Application
gun	O
and	O
exits	O
the	O
facility	O
in	O
an	O
elevator	O
,	O
bidding	O
Virgil	O
goodbye	O
.	O
</s>
<s>
In	O
a	O
post-credits	O
scene	O
,	O
AEGIS	O
has	O
enough	O
power	O
left	O
to	O
initiate	O
one	O
final	O
fail-safe	O
:	O
waking	O
up	O
the	O
test	O
subject	O
Chell	O
by	O
draining	O
the	O
reserve	O
power	O
so	O
she	O
can	O
escape	O
,	O
setting	O
up	O
the	O
events	O
of	O
Portal	B-Application
2	I-Application
.	O
</s>
<s>
Portal	B-Application
Stories	I-Application
:	I-Application
Mel	I-Application
was	O
developed	O
over	O
the	O
course	O
of	O
four	O
years	O
by	O
a	O
small	O
independent	O
team	O
of	O
Portal	B-Application
fans	O
under	O
the	O
name	O
Prism	O
Studios	O
.	O
</s>
<s>
On	O
June	O
20	O
,	O
2014	O
,	O
the	O
development	O
team	O
announced	O
that	O
they	O
were	O
aiming	O
for	O
a	O
release	O
in	O
the	O
first	O
quarter	O
of	O
2015	O
,	O
with	O
support	O
for	O
Windows	B-Application
,	O
and	O
OS	B-Operating_System
X	I-Operating_System
systems	O
.	O
</s>
<s>
On	O
August	O
1	O
,	O
2014	O
the	O
mod	O
advanced	O
through	O
the	O
Steam	B-Application
Greenlight	O
program	O
.	O
</s>
<s>
On	O
June	O
25	O
,	O
2015	O
,	O
the	O
mod	O
was	O
released	O
on	O
Steam	B-Application
as	O
a	O
free	O
download	O
for	O
owners	O
of	O
Portal	B-Application
2	I-Application
,	O
alongside	O
some	O
developer	O
commentary	O
videos	O
on	O
YouTube	B-General_Concept
.	I-General_Concept
</s>
<s>
Portal	B-Application
Stories	O
:	O
VR	O
,	O
a	O
virtual	B-Application
reality	I-Application
modification	O
of	O
Portal	B-Application
2	I-Application
,	O
was	O
released	O
on	O
16	O
May	O
2016	O
,	O
and	O
is	O
a	O
small	O
campaign	O
designed	O
for	O
the	O
room-scale	O
VR	O
that	O
SteamVR	O
offers	O
.	O
</s>
<s>
In	O
contrast	O
to	O
Portal	B-Application
2s	I-Application
puzzles	O
that	O
guided	O
the	O
player	O
to	O
discover	O
solutions	O
on	O
their	O
own	O
,	O
Mels	O
difficulty	O
was	O
a	O
"	O
reminder	O
that	O
games	O
are	O
just	O
as	O
beautiful	O
when	O
they	O
expect	O
the	O
inconceivable	O
from	O
us	O
"	O
.	O
</s>
<s>
Eurogamer	O
writer	O
Ian	O
Higton	O
described	O
it	O
as	O
the	O
Dark	B-Application
Souls	I-Application
of	O
Portal	B-Application
games	I-Application
,	O
stating	O
that	O
"	O
if	O
you	O
've	O
not	O
up	O
to	O
speed	O
with	O
everything	O
,	O
their	O
test	O
chambers	O
can	O
be	O
really	O
punishing	O
"	O
,	O
but	O
nevertheless	O
stated	O
that	O
it	O
"	O
nails	O
what	O
it	O
means	O
to	O
be	O
a	O
Valve	O
game	O
"	O
.	O
</s>
<s>
PC	O
Gamer	O
reviewer	O
Christopher	O
Livingston	O
stated	O
that	O
he	O
"	O
did	O
n't	O
find	O
the	O
humor	O
particularly	O
effective	O
"	O
,	O
though	O
it	O
was	O
written	O
"	O
with	O
a	O
lot	O
of	O
enthusiasm	O
and	O
an	O
obvious	O
fondness	O
for	O
the	O
Portal	B-Application
series	O
"	O
.	O
</s>
<s>
Portal	B-Application
Stories	I-Application
:	I-Application
Mel	I-Application
won	O
the	O
award	O
for	O
"	O
Best	O
Fan	O
Creation	O
"	O
at	O
The	O
Game	O
Awards	O
2015	O
.	O
</s>
