<s>
The	O
series	O
has	O
had	O
six	O
main	O
line	O
entries	O
,	O
and	O
seven	O
spin-off	O
entries	O
,	O
spanning	O
the	O
PlayStation	B-Device
,	O
PlayStation	B-Device
2	I-Device
,	O
PlayStation	B-Operating_System
4	I-Operating_System
,	O
PlayStation	B-Operating_System
Portable	I-Operating_System
,	O
PlayStation	B-Device
Vita	I-Device
,	O
Game	B-Device
Boy	I-Device
Advance	I-Device
and	O
Nintendo	B-Device
DS	I-Device
video	B-Device
game	I-Device
consoles	I-Device
.	O
</s>
<s>
The	O
only	O
titles	O
localized	O
into	O
English	O
were	O
the	O
spinoff	O
games	O
Summon	B-Application
Night	I-Application
:	I-Application
Twin	I-Application
Age	I-Application
,	O
Summon	B-Application
Night	I-Application
:	I-Application
Swordcraft	I-Application
Story	I-Application
and	O
its	O
sequel	O
,	O
Summon	B-Application
Night	I-Application
:	I-Application
Swordcraft	I-Application
Story	I-Application
2	I-Application
.	O
</s>
<s>
In	O
April	O
2015	O
,	O
it	O
was	O
announced	O
that	O
Gaijinworks	O
would	O
translate	O
and	O
publish	O
the	O
latest	O
entry	O
in	O
the	O
series	O
,	O
Summon	B-Application
Night	I-Application
5	I-Application
,	O
in	O
North	O
America	O
and	O
Europe	O
.	O
</s>
<s>
The	O
game	O
was	O
considered	O
a	O
success	O
in	O
North	O
America	O
,	O
with	O
its	O
sales	O
being	O
enough	O
to	O
warrant	O
Gaijinworks	O
to	O
translate	O
its	O
sequel	O
Summon	B-Application
Night	I-Application
6	I-Application
,	O
which	O
was	O
released	O
in	O
both	O
North	O
America	O
and	O
Europe	O
in	O
late	O
2017	O
.	O
</s>
<s>
The	O
Summon	B-Application
Night	I-Application
series	I-Application
has	O
sold	O
a	O
total	O
of	O
1.904	O
million	O
copies	O
.	O
</s>
<s>
Summon	B-Application
Night	I-Application
(	O
January	O
6	O
,	O
2000	O
)	O
Released	O
for	O
the	O
PlayStation/remade	O
for	O
Nintendo	B-Device
DS	I-Device
.	O
</s>
<s>
Summon	B-Application
Night	I-Application
2	I-Application
(	O
August	O
2	O
,	O
2001	O
)	O
Released	O
for	O
the	O
PlayStation/remade	O
for	O
Nintendo	B-Device
DS	I-Device
.	O
</s>
<s>
Summon	B-Application
Night	I-Application
3	O
(	O
August	O
7	O
,	O
2003	O
)	O
Released	O
for	O
the	O
PlayStation	O
2/Remake	O
for	O
the	O
PSP	B-Operating_System
was	O
released	O
on	O
October	O
4	O
,	O
2012	O
.	O
</s>
<s>
Summon	B-Application
Night	I-Application
4	I-Application
(	O
November	O
30	O
,	O
2006	O
)	O
Released	O
for	O
the	O
PlayStation	O
2/Remake	O
for	O
the	O
PSP	B-Operating_System
was	O
released	O
on	O
November	O
15	O
,	O
2012	O
.	O
</s>
<s>
Summon	B-Application
Night	I-Application
5	I-Application
(	O
May	O
16	O
,	O
2013	O
)	O
Released	O
for	O
the	O
PSP	B-Operating_System
.	O
</s>
<s>
Summon	B-Application
Night	I-Application
6	I-Application
:	I-Application
Lost	I-Application
Borders	I-Application
(	O
2016	O
)	O
Released	O
for	O
PlayStation	B-Device
Vita	I-Device
and	O
PlayStation	B-Operating_System
4	I-Operating_System
.	O
</s>
<s>
The	O
following	O
games	O
are	O
action-RPGs	O
in	O
the	O
style	O
of	O
Ys	O
or	O
Seiken	B-Application
Densetsu	I-Application
.	O
</s>
<s>
Summon	B-Application
Night	I-Application
EX-These	O
:	O
Yoake	O
no	O
Tsubasa	O
(	O
August	O
4	O
,	O
2005	O
)	O
Released	O
for	O
the	O
PlayStation	B-Device
2	I-Device
.	O
</s>
<s>
Summon	B-Application
Night	I-Application
Twin	I-Application
Age	I-Application
:	O
Seireitachi	O
no	O
Kyoumei	O
(	O
Koe	O
)	O
(	O
August	O
30	O
,	O
2007	O
;	O
USA	O
:	O
June	O
3	O
,	O
2008	O
)	O
Released	O
for	O
the	O
Nintendo	B-Device
DS	I-Device
,	O
localized	O
by	O
Atlus	O
in	O
the	O
US	O
as	O
Summon	B-Application
Night	I-Application
:	I-Application
Twin	I-Application
Age	I-Application
.	O
</s>
<s>
Summon	B-Application
Night	I-Application
Gran-These	O
:	O
Horobi	O
no	O
Tsurugi	O
to	O
Yakusoku	O
no	O
Kishi	O
(	O
March	O
11	O
,	O
2010	O
)	O
Released	O
for	O
the	O
PlayStation	B-Device
2	I-Device
.	O
</s>
<s>
The	O
following	O
three	O
games	O
are	O
Summon	B-Application
Night	I-Application
games	O
in	O
the	O
action-RPG	O
genre	O
.	O
</s>
<s>
Summon	B-Application
Night	I-Application
:	I-Application
Swordcraft	I-Application
Story	I-Application
(	O
Japan	O
:	O
April	O
25	O
,	O
2003	O
;	O
USA	O
:	O
July	O
26	O
,	O
2006	O
)	O
Released	O
for	O
the	O
Game	B-Device
Boy	I-Device
Advance	I-Device
,	O
localized	O
by	O
Atlus	O
in	O
the	O
USA	O
.	O
</s>
<s>
Summon	B-Application
Night	I-Application
:	I-Application
Swordcraft	I-Application
Story	I-Application
2	I-Application
(	O
Japan	O
:	O
August	O
20	O
,	O
2004	O
;	O
USA	O
:	O
October	O
17	O
,	O
2006	O
)	O
Released	O
for	O
the	O
Game	B-Device
Boy	I-Device
Advance	I-Device
;	O
also	O
localized	O
by	O
Atlus	O
.	O
</s>
<s>
Summon	B-Application
Night	I-Application
Swordcraft	I-Application
Story	I-Application
3	I-Application
:	I-Application
Stone	I-Application
of	I-Application
Beginnings	I-Application
(	O
December	O
8	O
,	O
2005	O
)	O
Released	O
for	O
the	O
Game	B-Device
Boy	I-Device
Advance	I-Device
.	O
</s>
<s>
The	O
following	O
game	O
is	O
an	O
RPG	O
with	O
turn-based	O
battles	O
in	O
the	O
style	O
of	O
the	O
Final	B-Application
Fantasy	I-Application
series	O
.	O
</s>
<s>
Summon	B-Application
Night	I-Application
X	I-Application
:	I-Application
Tears	I-Application
Crown	I-Application
(	O
November	O
5	O
,	O
2009	O
)	O
Released	O
for	O
the	O
Nintendo	B-Device
DS	I-Device
.	O
</s>
<s>
All	O
of	O
the	O
Summon	B-Application
Night	I-Application
games	O
take	O
place	O
in	O
Lyndbaum	O
,	O
a	O
world	O
similar	O
to	O
medieval	O
Europe	O
with	O
the	O
inclusion	O
of	O
modern	O
factories	O
and	O
railroads	O
,	O
placing	O
Summon	B-Application
Night	I-Application
in	O
a	O
steampunk	O
setting	O
.	O
</s>
