<s>
It	O
is	O
the	O
eighth	O
game	O
in	O
the	O
Touhou	B-Application
Project	I-Application
series	O
,	O
and	O
the	O
third	O
main	O
Touhou	B-Application
game	O
to	O
be	O
released	O
specifically	O
for	O
the	O
Windows	B-Application
operating	I-Application
system	I-Application
.	O
</s>
<s>
Imperishable	B-Application
Night	I-Application
introduces	O
the	O
'	O
partner	O
 '	O
system	O
,	O
allowing	O
the	O
player	O
a	O
choice	O
between	O
four	O
teams	O
of	O
two	O
characters	O
to	O
switch	O
between	O
,	O
each	O
with	O
their	O
own	O
shot	O
type	O
,	O
in	O
real-time	O
.	O
</s>
<s>
Imperishable	B-Application
Night	I-Application
is	O
a	O
vertically	O
scrolling	O
danmaku	O
game	O
,	O
in	O
which	O
the	O
player	O
character	O
is	O
always	O
facing	O
towards	O
the	O
top	O
of	O
the	O
screen	O
,	O
attacking	O
enemies	O
,	O
dodging	O
their	O
attacks	O
,	O
and	O
having	O
to	O
face	O
a	O
boss	O
at	O
the	O
end	O
of	O
each	O
stage	O
.	O
</s>
<s>
Unique	O
to	O
Imperishable	B-Application
Night	I-Application
is	O
the	O
Last	O
Spell	O
system	O
.	O
</s>
<s>
Another	O
unique	O
part	O
of	O
Imperishable	B-Application
Night	I-Application
is	O
the	O
bosses	O
.	O
</s>
<s>
Imperishable	B-Application
Night	I-Application
utilizes	O
a	O
'	O
time	O
 '	O
counter	O
,	O
which	O
requires	O
the	O
player	O
to	O
collect	O
a	O
certain	O
amount	O
of	O
"	O
time	O
points	O
"	O
,	O
which	O
are	O
acquired	O
in	O
the	O
same	O
manner	O
as	O
regular	O
points	O
–	O
collecting	O
point	O
items	O
,	O
grazing	O
enemy	O
bullets	O
,	O
or	O
killing	O
enemies	O
.	O
</s>
<s>
Because	O
of	O
this	O
system	O
,	O
Imperishable	B-Application
Night	I-Application
is	O
the	O
only	O
Touhou	B-Application
game	O
in	O
which	O
the	O
player	O
can	O
use	O
a	O
continue	O
,	O
and	O
still	O
get	O
the	O
good	O
ending	O
.	O
</s>
<s>
Imperishable	B-Application
Night	I-Application
features	O
a	O
total	O
of	O
eight	O
playable	O
characters	O
,	O
in	O
pre-set	O
pairs	O
,	O
and	O
,	O
upon	O
completing	O
the	O
game	O
with	O
all	O
teams	O
,	O
the	O
game	O
allows	O
the	O
player	O
to	O
select	O
these	O
characters	O
individually	O
.	O
</s>
<s>
The	O
enemies	O
 '	O
alternating	O
vulnerabilities	O
in	O
this	O
game	O
have	O
been	O
compared	O
to	O
Ikaruga	B-Application
.	O
</s>
<s>
The	O
stage	O
practice	O
,	O
allowing	O
the	O
player	O
to	O
practice	O
an	O
entire	O
stage	O
,	O
provided	O
they	O
have	O
completed	O
it	O
already	O
,	O
is	O
also	O
present	O
in	O
Imperishable	B-Application
Night	I-Application
.	O
</s>
<s>
In	O
order	O
to	O
find	O
the	O
real	O
moon	O
before	O
sunrise	O
,	O
the	O
protagonists	O
search	O
for	O
the	O
person	O
that	O
stole	O
the	O
moon	O
,	O
so	O
they	O
can	O
return	O
it	O
,	O
and	O
prevent	O
the	O
possibility	O
of	O
an	O
imperishable	B-Application
night	I-Application
.	O
</s>
<s>
After	O
multiple	O
battles	O
,	O
including	O
one	O
with	O
Reimu	O
or	O
Marisa	O
(	O
depending	O
on	O
who	O
the	O
player	O
character	O
is	O
)	O
,	O
who	O
was	O
also	O
searching	O
for	O
the	O
answer	O
,	O
the	O
protagonists	O
reaches	O
Eientei	B-Application
,	O
the	O
mansion	O
of	O
the	O
perpetrator	O
.	O
</s>
<s>
Imperishable	B-Application
Night	I-Application
was	O
created	O
by	O
Team	O
Shanghai	O
Alice	O
,	O
which	O
consists	O
of	O
a	O
single	O
member	O
,	O
who	O
goes	O
by	O
the	O
pseudonym	O
of	O
ZUN	O
.	O
</s>
<s>
The	O
idea	O
for	O
Imperishable	B-Application
Night	I-Application
started	O
with	O
this	O
desire	O
,	O
and	O
the	O
plot	O
was	O
written	O
later	O
to	O
justify	O
this	O
system	O
.	O
</s>
<s>
ZUN	O
had	O
considered	O
the	O
idea	O
for	O
Embodiment	B-Application
of	I-Application
Scarlet	I-Application
Devil	I-Application
,	O
but	O
he	O
felt	O
that	O
having	O
playable	O
characters	O
that	O
had	O
not	O
previously	O
introduced	O
would	O
be	O
unnatural	O
.	O
</s>
<s>
Thus	O
he	O
decided	O
to	O
make	O
the	O
system	O
in	O
Team	O
Shanghai	O
Alice	O
's	O
third	O
game	O
,	O
Imperishable	B-Application
Night	I-Application
,	O
so	O
he	O
could	O
introduce	O
new	O
characters	O
in	O
the	O
first	O
and	O
second	O
game	O
.	O
</s>
<s>
In	O
the	O
end	O
,	O
ZUN	O
picked	O
Alice	O
from	O
the	O
pre-Windows	O
games	O
to	O
be	O
Marisa	O
's	O
partner	O
since	O
he	O
thought	O
Alice	O
was	O
a	O
"	O
Youkai	O
version	O
of	O
Marisa	O
"	O
,	O
and	O
thus	O
reintroduced	O
her	O
in	O
Perfect	B-Application
Cherry	I-Application
Blossom	I-Application
.	O
</s>
<s>
"	O
Imperishable	B-Application
Night	I-Application
:	O
Easier	O
challenge	O
means	O
more	O
adrenaline	O
?	O
"	O
.	O
</s>
<s>
Related	O
mediaTouhou	O
Bōgetsushō	O
( 東方儚月抄	O
)	O
is	O
an	O
extension	O
of	O
the	O
story	O
in	O
Imperishable	B-Application
Night	I-Application
,	O
split	O
into	O
three	O
parts	O
,	O
each	O
carried	O
by	O
a	O
different	O
Ichijinsha	O
magazine	O
.	O
</s>
<s>
The	O
plot	O
of	O
Touhou	B-Application
Bōgetsushō	O
overall	O
revolves	O
around	O
the	O
disturbances	O
on	O
the	O
lunar	O
capital	O
,	O
Yukari	O
's	O
plans	O
to	O
invade	O
the	O
moon	O
,	O
and	O
Remilia	O
's	O
rocket	O
trip	O
to	O
the	O
moon	O
.	O
</s>
<s>
Ichijinsha	O
sought	O
ZUN	O
for	O
this	O
venture	O
before	O
he	O
started	O
to	O
work	O
on	O
Mountain	B-Application
of	I-Application
Faith	I-Application
,	O
and	O
ZUN	O
once	O
had	O
thoughts	O
to	O
make	O
the	O
manga	O
about	O
the	O
upcoming	O
game	O
.	O
</s>
<s>
However	O
,	O
as	O
development	O
of	O
Mountain	B-Application
of	I-Application
Faith	I-Application
progressed	O
,	O
ZUN	O
decided	O
that	O
he	O
should	O
base	O
the	O
story	O
on	O
something	O
that	O
Touhou	B-Application
fans	O
were	O
already	O
familiar	O
with	O
.	O
</s>
