<s>
It	O
is	O
the	O
sequel	O
to	O
To	B-Application
Heart	I-Application
2	I-Application
:	I-Application
Dungeon	I-Application
Travelers	I-Application
within	O
the	O
To	B-Application
Heart	I-Application
2	I-Application
franchise	O
.	O
</s>
<s>
Dungeon	B-Application
Travelers	I-Application
2	I-Application
was	O
released	O
on	O
March	O
28	O
,	O
2013	O
,	O
on	O
the	O
PlayStation	B-Operating_System
Portable	I-Operating_System
in	O
Japan	O
;	O
an	O
enhanced	O
remake	O
for	O
the	O
PlayStation	B-Device
Vita	I-Device
was	O
released	O
in	O
Japan	O
on	O
September	O
25	O
,	O
2014	O
,	O
and	O
later	O
in	O
North	O
America	O
and	O
Europe	O
in	O
2015	O
.	O
</s>
<s>
A	O
sequel	O
game	O
for	O
the	O
PlayStation	B-Device
Vita	I-Device
titled	O
Dungeon	O
Travelers	O
2-2	O
was	O
released	O
in	O
2017	O
in	O
Japan	O
.	O
</s>
<s>
The	O
original	O
PlayStation	B-Operating_System
Portable	I-Operating_System
game	O
was	O
released	O
in	O
March	O
2013	O
by	O
Aquaplus	O
,	O
as	O
part	O
of	O
a	O
long	O
line	O
of	O
games	O
and	O
media	O
derived	O
from	O
the	O
erotic	B-Application
visual	O
novel	O
To	B-Application
Heart	I-Application
and	O
its	O
sequel	O
,	O
To	B-Application
Heart	I-Application
2	I-Application
.	O
</s>
<s>
Later	O
in	O
June	O
2014	O
,	O
the	O
PlayStation	B-Device
Vita	I-Device
version	O
was	O
released	O
,	O
which	O
included	O
additional	O
characters	O
,	O
redesigned	O
dungeons	O
,	O
improved	O
user	O
interface	O
,	O
and	O
improved	O
quality	O
illustrations	O
.	O
</s>
<s>
The	O
western	O
localisation	O
by	O
Atlus	O
features	O
Japanese	O
voices	O
with	O
English	O
subtitles	O
,	O
and	O
is	O
compatible	O
with	O
the	O
PlayStation	B-Device
TV	I-Device
.	O
</s>
<s>
When	O
it	O
released	O
in	O
Japan	O
on	O
the	O
PSP	B-Operating_System
,	O
32,000	O
copies	O
of	O
Dungeon	B-Application
Travelers	I-Application
2	I-Application
were	O
sold	O
,	O
with	O
39,000	O
sold	O
after	O
two	O
weeks	O
,	O
while	O
the	O
PS	B-Device
Vita	I-Device
version	O
sold	O
16,000	O
copies	O
in	O
its	O
launch	O
week	O
and	O
20,000	O
total	O
after	O
its	O
second	O
week	O
.	O
</s>
