<s>
Etrian	B-Application
Odyssey	I-Application
IV	I-Application
:	I-Application
Legends	I-Application
of	I-Application
the	I-Application
Titan	I-Application
is	O
a	O
dungeon	O
crawler	O
role	O
playing	O
video	O
game	O
developed	O
and	O
published	O
by	O
Atlus	O
for	O
the	O
Nintendo	B-Operating_System
3DS	I-Operating_System
.	O
</s>
<s>
It	O
is	O
the	O
sequel	O
to	O
Etrian	B-Application
Odyssey	I-Application
III	I-Application
:	I-Application
The	I-Application
Drowned	I-Application
City	I-Application
and	O
the	O
first	O
in	O
the	O
Etrian	B-Application
Odyssey	I-Application
series	O
to	O
be	O
released	O
on	O
the	O
Nintendo	B-Operating_System
3DS	I-Operating_System
.	O
</s>
<s>
For	O
centuries	O
,	O
the	O
tree	O
Yggdrasil	B-Application
has	O
been	O
a	O
constant	O
presence	O
in	O
the	O
lives	O
of	O
the	O
people	O
of	O
Tharsis	O
.	O
</s>
<s>
But	O
its	O
roots	O
are	O
in	O
a	O
far-off	O
land	O
where	O
no	O
one	O
has	O
ventured	O
until	O
the	O
Outland	O
Count	O
of	O
Tharsis	O
sponsors	O
an	O
Explorers	O
Guild	O
to	O
reach	O
Yggdrasil	B-Application
and	O
discover	O
its	O
secrets	O
.	O
</s>
<s>
After	O
venturing	O
through	O
numerous	O
lands	O
,	O
the	O
player	O
discovers	O
a	O
sealed-off	O
,	O
fallen	O
Empire	O
with	O
more	O
advanced	O
technology	O
whose	O
prince	O
,	O
Baldur	O
,	O
wishes	O
to	O
awaken	O
the	O
Titan	O
,	O
also	O
known	O
as	O
Heavenbringer	O
,	O
the	O
humanoid	O
form	O
of	O
Yggdrasil	B-Application
.	O
</s>
<s>
While	O
Prince	O
Baldur	O
succeeds	O
in	O
awakening	O
Heavenbringer	O
from	O
within	O
the	O
ancient	O
capital	O
beneath	O
Yggdrasil	B-Application
,	O
he	O
is	O
corrupted	O
by	O
it	O
.	O
</s>
<s>
An	O
optional	O
post-game	O
dungeon	O
is	O
the	O
Hall	O
of	O
Darkness	O
,	O
a	O
facility	O
in	O
which	O
ancient	O
researchers	O
attempted	O
to	O
develop	O
a	O
countermeasure	O
to	O
Yggdrasil	B-Application
should	O
they	O
lose	O
control	O
of	O
it	O
,	O
but	O
failed	O
and	O
created	O
an	O
even	O
more	O
powerful	O
abomination	O
that	O
they	O
were	O
forced	O
to	O
seal	O
away	O
.	O
</s>
<s>
The	O
price	O
and	O
the	O
release	O
date	O
of	O
July	O
5	O
,	O
2012	O
were	O
confirmed	O
during	O
the	O
Direct	O
,	O
while	O
the	O
official	O
blog	O
and	O
Twitter	B-Application
account	I-Application
was	O
also	O
unveiled	O
on	O
the	O
same	O
day	O
.	O
</s>
<s>
The	O
soundtrack	O
is	O
known	O
as	O
Etrian	B-Application
Odyssey	I-Application
IV	I-Application
:	O
Soundtrack	O
Rough	O
Sketch	O
ver	O
+	O
Outtakes	O
.	O
</s>
<s>
Elsewhere	O
,	O
the	O
game	O
also	O
received	O
"	O
favorable	O
"	O
reviews	O
according	O
to	O
video	O
game	O
review	B-Application
aggregator	I-Application
Metacritic	O
.	O
</s>
<s>
Etrian	B-Application
Odyssey	I-Application
IV	I-Application
sold	O
100,000	O
copies	O
in	O
its	O
first	O
week	O
of	O
release	O
in	O
Japan	O
according	O
to	O
Media	O
Create	O
,	O
giving	O
it	O
the	O
highest	O
opening	O
sales	O
in	O
the	O
Etrian	B-Application
Odyssey	I-Application
franchise	O
series	O
to	O
date	O
.	O
</s>
