<s>
is	O
a	O
dungeon	O
crawler	O
role-playing	O
video	O
game	O
for	O
the	O
PlayStation	B-Device
Vita	I-Device
developed	O
and	O
published	O
by	O
Compile	O
Heart	O
and	O
Idea	O
Factory	O
.	O
</s>
<s>
It	O
was	O
followed	O
by	O
two	O
sequels	O
Mary	B-Application
Skelter	I-Application
2	I-Application
and	O
Mary	B-Application
Skelter	I-Application
Finale	I-Application
,	O
respectively	O
.	O
</s>
