<s>
Alienation	B-Application
is	O
an	O
action	B-Application
role-playing	I-Application
shooter	O
video	O
game	O
developed	O
by	O
Housemarque	O
and	O
published	O
by	O
Sony	O
Interactive	O
Entertainment	O
for	O
the	B-Operating_System
PlayStation	I-Operating_System
4	I-Operating_System
.	O
</s>
<s>
The	O
game	O
is	O
an	O
isometric	B-Application
twin-stick	O
shooter	O
in	O
which	O
one	O
to	O
four	O
players	O
defend	O
themselves	O
against	O
an	O
alien	O
invasion	O
on	O
Earth	O
through	O
increasingly-difficult	O
levels	O
.	O
</s>
<s>
The	O
development	O
of	O
Alienation	B-Application
was	O
hinted	O
at	O
in	O
early	O
January	O
2014	O
and	O
announced	O
at	O
the	O
2014	O
Sony	O
Gamescom	O
convention	O
.	O
</s>
<s>
Since	O
the	O
release	O
of	O
Alienation	B-Application
,	O
Housemarque	O
has	O
updated	O
the	O
game	O
with	O
free	O
and	O
paid	O
expansions	B-Protocol
.	O
</s>
<s>
Alienation	B-Application
is	O
an	O
isometric	B-Application
twin-stick	O
shooter	O
game	O
set	O
in	O
a	O
future	O
in	O
which	O
aliens	O
are	O
invading	O
Earth	O
.	O
</s>
<s>
The	O
Saboteur	O
has	O
the	O
ability	O
to	O
become	O
invisible	O
,	O
and	O
can	O
call	O
in	O
airstrikes	B-Application
when	O
needed	O
.	O
</s>
<s>
When	O
Alienation	B-Application
story	O
mode	O
is	O
completed	O
,	O
the	O
player	O
unlocks	O
missions	O
with	O
bounty-like	O
assignments	O
and	O
quests	O
with	O
special	O
items	O
as	O
rewards	O
.	O
</s>
<s>
Alienation	B-Application
was	O
developed	O
by	O
Finnish	O
video	O
game	O
company	O
Housemarque	O
and	O
published	O
by	O
Sony	O
Interactive	O
Entertainment	O
.	O
</s>
<s>
It	O
was	O
released	O
on	O
April	O
26	O
,	O
2016	O
exclusively	O
for	O
the	B-Operating_System
PlayStation	I-Operating_System
4	I-Operating_System
.	O
</s>
<s>
Haveri	O
cited	O
Dark	B-Application
Souls	I-Application
and	O
Demon	B-Application
's	I-Application
Souls	I-Application
as	O
examples	O
,	O
saying	O
that	O
they	O
"	O
take	O
a	O
concept	O
[	O
the	O
developers ]	O
like	O
and	O
try	O
and	O
improve	O
it	O
or	O
put	O
a	O
twist	O
on	O
it	O
"	O
.	O
</s>
<s>
According	O
to	O
Haveri	O
,	O
Alienation	B-Application
would	O
have	O
content	O
(	O
such	O
as	O
better	O
explosion	O
mechanics	O
)	O
which	O
players	O
had	O
not	O
seen	O
before	O
.	O
</s>
<s>
He	O
noted	O
the	O
chance	O
of	O
references	O
to	O
other	O
Housemarque	O
games	O
,	O
similar	O
to	O
how	O
the	O
incorporation	O
of	O
Resogun	B-Application
ships	O
into	O
Dead	B-Application
Nation	I-Application
.	O
</s>
<s>
In	O
April	O
2015	O
the	O
developers	O
released	O
details	O
about	O
Alienation	B-Application
gameplay	O
,	O
saying	O
that	O
it	O
would	O
feature	O
three	O
character	O
classes	O
,	O
and	O
"	O
plenty	O
of	O
loot	O
and	O
a	O
ton	O
of	O
weapon	O
customization	O
"	O
.	O
</s>
<s>
In	O
early	O
2016	O
,	O
Alienation	B-Application
was	O
showcased	O
at	O
Sony	O
's	O
PlayStation	O
Digital	O
Showcase	O
.	O
</s>
<s>
Sony	O
announced	O
that	O
Alienation	B-Application
would	O
be	O
released	O
sometime	O
in	O
2015	O
.	O
</s>
<s>
Since	O
Alienation	B-Application
release	O
,	O
Housemarque	O
has	O
updated	O
and	O
added	O
downloadable	B-Protocol
content	I-Protocol
(	O
DLC	B-Protocol
)	O
to	O
the	O
game	O
.	O
</s>
<s>
On	O
July	O
5	O
,	O
a	O
season	O
pass	O
and	O
the	O
first	O
DLC	B-Protocol
(	O
the	O
Survivor	O
's	O
Pack	O
)	O
were	O
introduced	O
,	O
along	O
with	O
a	O
mention	O
of	O
upcoming	O
DLC	B-Protocol
titled	O
the	O
Conqueror	O
's	O
Pack	O
.	O
</s>
<s>
On	O
August	O
23	O
,	O
Housemarque	O
introduced	O
three	O
new	O
DLC	B-Protocol
:	O
the	O
Weapons	O
Pack	O
,	O
the	O
Armor	O
Paint	O
Pack	O
and	O
the	O
Veteran	O
Heroes	O
pack	O
,	O
all	O
of	O
which	O
(	O
with	O
the	O
Survivor	O
's	O
Pack	O
and	O
the	O
Conqueror	O
's	O
Pack	O
)	O
were	O
included	O
in	O
the	O
season	O
pass	O
.	O
</s>
<s>
Alienation	B-Application
was	O
met	O
with	O
positive	O
reviews	O
from	O
video-game	O
critics	O
upon	O
release	O
.	O
</s>
<s>
It	O
received	O
a	O
score	O
of	O
79	O
out	O
of	O
100	O
on	O
the	O
review	B-Application
aggregator	I-Application
website	O
Metacritic	O
,	O
indicating	O
"	O
generally	O
favorable	O
reviews	O
"	O
.	O
</s>
<s>
Matt	O
Miller	O
wrote	O
for	O
the	O
video-game	O
magazine	O
Game	O
Informer	O
that	O
in	O
multiplayer	O
mode	O
,	O
Alienation	B-Application
had	O
some	O
of	O
the	O
best	O
twin-stick	O
shooting	O
gameplay	O
available	O
.	O
</s>
<s>
On	O
GameSpot	O
,	O
a	O
video-game	O
news	O
website	O
,	O
Jason	O
D'Aprile	O
praised	O
Alienation	B-Application
cooperative	O
gameplay	O
but	O
was	O
frustrated	O
by	O
the	O
lack	O
of	O
a	O
local	O
mode	O
,	O
though	O
he	O
said	O
that	O
"	O
with	O
a	O
full	O
troop	O
online	O
"	O
the	O
game	O
was	O
"	O
easily	O
one	O
of	O
the	O
best	O
all-out	O
action	O
multiplayer	O
games	O
in	O
recent	O
memory	O
"	O
.	O
</s>
<s>
According	O
to	O
IGN	O
Vince	O
Ingenito	O
,	O
Alienation	B-Application
did	O
not	O
have	O
enough	O
weapons	O
and	O
was	O
disappointed	O
that	O
many	O
of	O
the	O
weapons	O
looked	O
and	O
behaved	O
the	O
same	O
way	O
.	O
</s>
<s>
Reviewers	O
had	O
other	O
issues	O
with	O
Alienation	B-Application
.	O
</s>
