<s>
is	O
an	O
action	B-Application
role-playing	I-Application
video	I-Application
game	I-Application
for	O
the	O
PlayStation	B-Operating_System
3	I-Operating_System
,	O
PlayStation	B-Device
Vita	I-Device
,	O
PlayStation	B-Operating_System
4	I-Operating_System
and	O
Microsoft	B-Application
Windows	I-Application
based	O
on	O
the	O
Sword	B-Application
Art	I-Application
Online	I-Application
light	O
novel	O
series	O
.	O
</s>
<s>
It	O
is	O
the	O
third	O
video	O
game	O
in	O
the	O
series	O
and	O
is	O
the	O
successor	O
to	O
the	O
2014	O
game	O
Sword	B-Application
Art	I-Application
Online	I-Application
:	I-Application
Hollow	I-Application
Fragment	I-Application
.	O
</s>
<s>
Lost	B-Application
Song	I-Application
story	O
is	O
based	O
on	O
an	O
alternate	O
timeline	O
of	O
Sword	B-Application
Art	I-Application
Online	I-Application
that	O
does	O
not	O
follow	O
the	O
canon	O
storyline	O
of	O
the	O
light	O
novels	O
.	O
</s>
<s>
It	O
follows	O
series	O
protagonist	O
Kirito	O
and	O
his	O
friends	O
as	O
they	O
play	O
the	O
Virtual	B-Application
Reality	I-Application
Massively	B-Protocol
Multiplayer	I-Protocol
Online	I-Protocol
Role-Playing	I-Protocol
Game	I-Protocol
(	O
VRMMORPG	O
)	O
called	O
ALfheim	O
Online	O
(	O
ALO	O
)	O
.	O
</s>
<s>
Lost	B-Application
Song	I-Application
received	O
mostly	O
mixed	O
reviews	O
,	O
with	O
the	O
multiplayer	O
and	O
controls	O
being	O
praised	O
;	O
however	O
,	O
the	O
game	O
's	O
dungeons	O
were	O
criticized	O
for	O
being	O
bland	O
and	O
recycled	O
.	O
</s>
<s>
A	O
sequel	O
,	O
Sword	B-Application
Art	I-Application
Online	I-Application
:	I-Application
Hollow	I-Application
Realization	I-Application
,	O
was	O
announced	O
at	O
Dengeki	O
Bunko	O
Fall	O
Fest	O
2015	O
for	O
PS4	B-Operating_System
and	O
Vita	O
,	O
with	O
a	O
release	O
date	O
set	O
in	O
2016	O
.	O
</s>
<s>
Unlike	O
its	O
predecessors	O
,	O
which	O
have	O
MMORPG-like	O
gameplay	O
,	O
Lost	B-Application
Song	I-Application
is	O
labeled	O
as	O
an	O
action	B-Application
game	I-Application
instead	O
of	O
a	O
role-playing	O
game	O
.	O
</s>
<s>
It	O
is	O
the	O
first	O
game	O
in	O
the	O
series	O
that	O
allows	O
one	O
to	O
play	O
as	O
characters	O
besides	O
protagonist	O
Kirito	O
;	O
there	O
are	O
19	O
characters	O
available	O
,	O
though	O
two	O
are	O
only	O
attainable	O
through	O
downloadable	B-Protocol
content	I-Protocol
.	O
</s>
<s>
Lost	B-Application
Song	I-Application
takes	O
place	O
in	O
Svart	O
ALfheim	O
,	O
a	O
set	O
of	O
floating	O
continents	O
in	O
ALfheim	O
Online	O
.	O
</s>
<s>
Based	O
in	O
the	O
same	O
continuity	O
as	O
Hollow	B-Application
Fragment	I-Application
,	O
the	O
game	O
follows	O
an	O
alternate	O
timeline	O
from	O
the	O
original	O
series	O
;	O
instead	O
of	O
escaping	O
Sword	B-Application
Art	I-Application
Online	I-Application
on	O
floor	O
75	O
like	O
in	O
canon	O
,	O
the	O
players	O
were	O
forced	O
to	O
progress	O
through	O
the	O
game	O
's	O
remaining	O
25	O
floors	O
.	O
</s>
<s>
Lost	B-Application
Song	I-Application
occurs	O
at	O
the	O
same	O
chronological	O
point	O
as	O
the	O
Gun	O
Gale	O
Online	O
arc	O
in	O
Sword	B-Application
Art	I-Application
Online	I-Application
II	O
,	O
but	O
the	O
characters	O
are	O
instead	O
exploring	O
ALfheim	O
Online	O
,	O
the	O
newest	O
virtual	B-Application
reality	I-Application
MMORPG	B-Protocol
to	O
be	O
released	O
.	O
</s>
<s>
Lost	B-Application
Song	I-Application
introduces	O
three	O
new	O
characters	O
that	O
play	O
a	O
role	O
in	O
the	O
plot	O
:	O
Nanairo	O
"	O
Seven	O
"	O
Arshavin	O
,	O
an	O
idol	O
and	O
Russian	O
scientist	O
studying	O
virtual	B-Application
reality	I-Application
;	O
Nijika	O
"	O
Rain	O
"	O
Karatachi	O
,	O
an	O
SAO	O
survivor	O
and	O
Seven	O
's	O
older	O
sister	O
who	O
follows	O
Kirito	O
during	O
the	O
story	O
;	O
and	O
Sumeragi	O
,	O
Seven	O
's	O
bodyguard	O
.	O
</s>
<s>
After	O
the	O
events	O
of	O
Hollow	B-Application
Fragment	I-Application
and	O
escaping	O
Sword	B-Application
Art	I-Application
Online	I-Application
,	O
Kirito	O
expresses	O
an	O
interest	O
in	O
playing	O
ALO	O
,	O
and	O
decides	O
to	O
join	O
after	O
hearing	O
of	O
Seven	O
's	O
work	O
in	O
the	O
game	O
.	O
</s>
<s>
While	O
predecessors	O
Sword	B-Device
Art	I-Device
Online	I-Device
:	I-Device
Infinity	I-Device
Moment	I-Device
and	O
Hollow	B-Application
Fragment	I-Application
were	O
developed	O
by	O
Aquria	O
,	O
Artdink	O
was	O
selected	O
to	O
develop	O
Lost	B-Application
Song	I-Application
.	O
</s>
<s>
As	O
a	O
supplement	O
,	O
Re	O
:	O
Hollow	B-Application
Fragment	I-Application
,	O
an	O
improved	O
version	O
of	O
Hollow	B-Application
Fragment	I-Application
,	O
was	O
bundled	O
with	O
Lost	B-Application
Song	I-Application
as	O
Sword	B-Application
Art	I-Application
Online	I-Application
:	O
Game	O
Director	O
's	O
Edition	O
and	O
released	O
in	O
Japan	O
on	O
November	O
19	O
.	O
</s>
<s>
Re	O
:	O
Hollow	B-Application
Fragment	I-Application
was	O
also	O
available	O
as	O
a	O
free	O
downloadable	O
if	O
players	O
pre-ordered	O
Lost	B-Application
Song	I-Application
.	O
</s>
<s>
At	O
Dengeki	O
Game	O
Festival	O
2015	O
,	O
it	O
was	O
announced	O
that	O
Lost	B-Application
Song	I-Application
and	O
God	B-Application
Eater	I-Application
2	I-Application
,	O
also	O
published	O
by	O
Bandai	O
Namco	O
Games	O
,	O
would	O
have	O
DLC	B-Protocol
from	O
the	O
other	O
game	O
:	O
on	O
April	O
9	O
,	O
Dengeki	O
PlayStation	O
magazine	O
released	O
a	O
serial	O
code	O
of	O
Kirito	O
and	O
Sinon	O
's	O
costumes	O
for	O
God	B-Application
Eater	I-Application
2	I-Application
,	O
and	O
14	O
days	O
later	O
,	O
released	O
a	O
code	O
of	O
GE2	O
characters	O
Julius	O
and	O
Alisa	O
's	O
costumes	O
for	O
Lost	B-Application
Song	I-Application
.	O
</s>
<s>
At	O
Tokyo	O
Game	O
Show	O
2015	O
,	O
Kuroyukihime	O
,	O
from	O
Sword	B-Application
Art	I-Application
Online	I-Application
author	O
Reki	O
Kawahara	O
's	O
series	O
Accel	O
World	O
,	O
was	O
added	O
as	O
another	O
playable	O
character	O
in	O
Lost	B-Application
Song	I-Application
.	O
</s>
<s>
Lost	B-Application
Song	I-Application
was	O
released	O
in	O
Japan	O
for	O
the	B-Operating_System
PS3	I-Operating_System
and	O
Vita	O
on	O
March	O
26	O
,	O
2015	O
,	O
while	O
a	O
Traditional	O
Chinese	O
version	O
was	O
released	O
on	O
April	O
28	O
.	O
</s>
<s>
Sword	B-Application
Art	I-Application
Online	I-Application
:	I-Application
Lost	I-Application
Song	I-Application
received	O
"	O
mixed	O
or	O
average	O
"	O
reviews	O
,	O
according	O
to	O
video	O
game	O
review	B-Application
aggregator	I-Application
Metacritic	O
.	O
</s>
<s>
Destructoid	O
writer	O
Josh	O
Tolentino	O
believed	O
,	O
like	O
its	O
predecessors	O
,	O
Lost	B-Application
Song	I-Application
was	O
meant	O
for	O
fans	O
of	O
the	O
series	O
.	O
</s>
<s>
He	O
praised	O
the	O
combat	O
system	O
for	O
being	O
less	O
time-consuming	O
in	O
comparison	O
to	O
Hollow	B-Application
Fragment	I-Application
,	O
though	O
he	O
criticized	O
the	O
dungeons	O
as	O
being	O
bland	O
and	O
an	O
"	O
apathetic	O
level	O
design	O
"	O
.	O
</s>
<s>
Meanwhile	O
,	O
PlayStation	O
Lifestyle	O
awarded	O
it	O
a	O
score	O
of	O
7	O
out	O
of	O
10	O
,	O
calling	O
it	O
"	O
a	O
fun	O
,	O
lighthearted	O
and	O
breezy	O
run	O
through	O
well-worn	O
action-RPG	B-Application
territory.	O
"	O
</s>
<s>
Within	O
the	O
first	O
week	O
of	O
its	O
release	O
in	O
Japan	O
,	O
the	B-Operating_System
PS3	I-Operating_System
and	O
Vita	O
versions	O
sold	O
55,090	O
and	O
139,298	O
copies	O
,	O
respectively	O
,	O
with	O
a	O
total	O
of	O
194,388	O
copies	O
being	O
sold	O
.	O
</s>
<s>
The	O
numbers	O
reached	O
as	O
high	O
as	O
65,000	O
(	O
PS3	B-Operating_System
)	O
,	O
177,000	O
(	O
Vita	O
)	O
,	O
and	O
18,000	O
(	O
PS4	B-Operating_System
)	O
.	O
</s>
<s>
The	O
sequel	O
,	O
Sword	B-Application
Art	I-Application
Online	I-Application
:	I-Application
Hollow	I-Application
Realization	I-Application
,	O
was	O
released	O
in	O
October	O
2016	O
.	O
</s>
