<s>
is	O
a	O
tactical	O
role	O
playing	O
game	O
developed	O
by	O
Idea	O
Factory	O
and	O
released	O
for	O
the	O
PlayStation	B-Device
2	I-Device
in	O
2005	O
.	O
</s>
<s>
It	O
was	O
ported	O
to	O
the	O
PlayStation	B-Operating_System
Portable	I-Operating_System
as	O
and	O
to	O
mobile	O
devices	O
in	O
2011	O
as	O
Spectral	B-Application
Souls	I-Application
.	O
</s>
<s>
The	O
PSP	B-Operating_System
port	O
was	O
published	O
in	O
the	O
U.S.	O
by	O
NIS	O
America	O
,	O
and	O
in	O
Europe	O
by	O
Ghostlight	O
under	O
the	O
title	O
Spectral	B-Application
Souls	I-Application
:	I-Application
Resurrection	I-Application
of	I-Application
the	I-Application
Ethereal	I-Application
Empires	I-Application
.	O
</s>
<s>
Later	O
on	O
,	O
this	O
game	O
was	O
ported	O
to	O
Android	B-Application
and	O
iOS	B-Application
devices	O
.	O
</s>
<s>
The	O
iOS	B-Application
port	O
solves	O
the	O
problem	O
of	O
the	O
extreme	O
long	O
loading	O
time	O
issue	O
from	O
the	O
PSP	B-Operating_System
port	O
.	O
</s>
<s>
The	O
PSP	B-Operating_System
version	O
was	O
criticized	O
for	O
its	O
long	O
load	O
times	O
.	O
</s>
<s>
It	O
received	O
"	O
generally	O
unfavorable	O
"	O
reviews	O
according	O
to	O
the	O
review	B-Application
aggregation	I-Application
website	O
Metacritic	O
.	O
</s>
