<s>
Galactic	B-Application
Crusader	I-Application
is	O
an	O
unlicensed	O
vertically	O
scrolling	O
shooter	O
for	O
the	O
Nintendo	O
Entertainment	O
System	O
developed	O
by	O
Joy	O
Van	O
and	O
published	O
by	O
Sachen	O
in	O
1990	O
.	O
</s>
<s>
The	O
game	O
is	O
a	O
top-down	O
perspective	O
shooter	O
,	O
often	O
compared	O
to	O
the	O
popular	O
space	O
shooter	O
Galaga	B-Application
.	O
</s>
<s>
One	O
notable	O
difference	O
from	O
Galaga	B-Application
is	O
Galactic	B-Application
Crusader	I-Application
's	O
many	O
bosses	O
which	O
the	O
player	O
confronts	O
at	O
the	O
end	O
of	O
each	O
level	O
,	O
which	O
often	O
take	O
many	O
hits	O
to	O
defeat	O
.	O
</s>
