<s>
is	O
a	O
duology	O
of	O
Japanese	O
adult	B-Application
visual	O
novels	O
with	O
2D	O
action	O
elements	O
developed	O
by	O
Giga	O
.	O
</s>
<s>
The	O
first	O
game	O
,	O
named	O
Baldr	B-Application
Sky	I-Application
Dive1	O
"	O
Lost	O
Memory	O
”	O
was	O
released	O
in	O
Japan	O
on	O
March	O
27	O
,	O
2009	O
,	O
for	O
Windows	O
.	O
</s>
<s>
The	O
second	O
game	O
,	O
Baldr	B-Application
Sky	I-Application
Dive2	O
"	O
Recordare	O
"	O
was	O
released	O
in	O
Japan	O
on	O
November	O
27	O
,	O
2009	O
.	O
</s>
<s>
A	O
fandisc	O
called	O
Baldr	B-Application
Sky	I-Application
DiveX	O
"	O
Dream	O
World	O
"	O
was	O
released	O
in	O
Japan	O
on	O
September	O
24	O
,	O
2010	O
.	O
</s>
<s>
As	O
Baldr	B-Application
Sky	I-Application
has	O
multiple	O
endings	O
,	O
the	O
player	O
will	O
have	O
to	O
replay	O
the	O
game	O
multiple	O
times	O
in	O
order	O
to	O
view	O
all	O
of	O
the	O
endings	O
.	O
</s>
<s>
Similar	O
to	O
other	O
games	O
in	O
the	O
Baldr	O
series	O
,	O
Baldr	B-Application
Sky	I-Application
is	O
also	O
driven	O
by	O
a	O
top-down	O
2D	O
interface	O
where	O
the	O
player	O
controls	O
a	O
mecha	O
in	O
sprite	O
form	O
to	O
combat	O
enemy	O
machines	O
.	O
</s>
<s>
The	O
story	O
of	O
Baldr	B-Application
Sky	I-Application
revolves	O
around	O
the	O
male	O
protagonist	O
and	O
is	O
told	O
through	O
two	O
timelines	O
,	O
the	O
present	O
and	O
the	O
past	O
through	O
flashbacks	O
.	O
</s>
<s>
DevelopmentBaldr	O
Sky	O
is	O
the	O
third	O
game	O
in	O
the	O
Baldr	O
series	O
following	O
Baldr	B-Application
Force	I-Application
and	O
Baldr	O
Bullet	O
"	O
Revellion	O
"	O
.	O
</s>
<s>
On	O
September	O
24	O
,	O
2010	O
,	O
GIGA	O
also	O
published	O
a	O
fandisc	O
called	O
"	O
BALDR	B-Application
Sky	I-Application
DiveX	O
:	O
Dream	O
World	O
"	O
,	O
which	O
included	O
many	O
scenes	O
that	O
were	O
n't	O
mentioned	O
in	O
Dive1	O
and	O
Dive2	O
,	O
such	O
as	O
the	O
memories	O
of	O
Kou	O
while	O
he	O
was	O
a	O
mercenary	O
with	O
Rain.Baldr	O
Sky	O
"	O
Zero	O
"	O
,	O
another	O
game	O
in	O
the	O
series	O
,	O
had	O
been	O
in	O
production	O
and	O
released	O
in	O
March	O
2013	O
.	O
</s>
<s>
One	O
of	O
the	O
new	O
elements	O
is	O
a	O
crossover	O
between	O
the	O
Baldr	B-Application
Sky	I-Application
series	O
and	O
Jinki	O
series	O
(	O
Jinki	O
crossover	O
in	O
terms	O
of	O
art	O
design	O
)	O
.	O
</s>
