<s>
Deadly	B-Application
Towers	I-Application
is	O
an	O
action	B-Application
role-playing	I-Application
game	I-Application
co-developed	O
by	O
Lenar	O
and	O
Tamtex	O
for	O
Irem	O
as	O
a	O
software	O
title	O
for	O
the	O
Nintendo	O
Entertainment	O
System	O
(	O
NES	O
)	O
.	O
</s>
<s>
In	O
Japan	O
,	O
Deadly	B-Application
Towers	I-Application
was	O
titled	O
Mashō	O
( 魔鐘	O
)	O
,	O
literally	O
meaning	O
"	O
Evil	O
Bell	O
"	O
.	O
</s>
<s>
In	O
North	O
America	O
,	O
it	O
was	O
one	O
of	O
Irem	O
's	O
first	O
titles	O
on	O
the	O
NES	O
,	O
alongside	O
Spelunker	B-Application
and	O
Sqoon	B-Device
.	O
</s>
<s>
The	O
nonlinear	O
gameplay	O
is	O
comparable	O
to	O
that	O
of	O
The	B-Application
Legend	I-Application
of	I-Application
Zelda	I-Application
.	O
</s>
<s>
Deadly	B-Application
Towers	I-Application
was	O
the	O
work	O
of	O
Japanese	O
video	O
game	O
developers	O
Lenar	O
and	O
Tamtex	O
,	O
the	O
latter	O
being	O
owned	O
by	O
the	O
same	O
company	O
as	O
Irem	O
.	O
</s>
<s>
On	O
Lenar	O
's	O
side	O
,	O
the	O
game	O
was	O
co-designed	O
by	O
a	O
former	O
employee	O
from	O
Namco	O
(	O
Junichi	O
Mizutari	O
)	O
,	O
where	O
he	O
worked	O
on	O
the	O
similar	O
The	B-Application
Tower	I-Application
of	I-Application
Druaga	I-Application
.	O
</s>
<s>
The	O
name	O
,	O
"	O
Deadly	B-Application
Towers	I-Application
"	O
,	O
came	O
from	O
Ed	O
Bernstein	O
of	O
Broderbund	O
.	O
</s>
<s>
Deadly	B-Application
Towers	I-Application
and	O
Rygar	B-Application
(	O
whose	O
NES	O
release	O
preceded	O
Deadly	B-Application
Towers	I-Application
by	O
a	O
few	O
months	O
)	O
were	O
among	O
the	O
first	O
Japanese	O
action	B-Application
role-playing	I-Application
games	I-Application
to	O
be	O
published	O
in	O
North	O
America	O
.	O
</s>
<s>
Computer	O
Gaming	O
World	O
described	O
Deadly	B-Application
Towers	I-Application
as	O
a	O
new	O
kind	O
of	O
role-playing	O
game	O
that	O
differed	O
from	O
both	O
the	O
console	O
action-adventure	O
games	O
(	O
such	O
as	O
Castlevania	B-Application
and	O
Trojan	B-Application
)	O
and	O
American	O
computer	O
role-playing	O
games	O
(	O
such	O
as	O
those	O
in	O
the	O
series	O
Wizardry	B-Device
,	O
Ultima	O
,	O
and	O
Might	B-Application
and	I-Application
Magic	I-Application
)	O
.	O
</s>
<s>
Deadly	B-Application
Towers	I-Application
used	O
a	O
permanent	O
power-up	O
mechanic	O
,	O
which	O
blurred	O
the	O
line	O
between	O
the	O
power-ups	O
used	O
in	O
action-adventure	O
games	O
and	O
the	O
experience	O
levels	O
used	O
in	O
RPGs	O
.	O
</s>
<s>
In	O
2007	O
,	O
J	O
.	O
C	O
.	O
Fletcher	O
of	O
the	O
video	O
game	O
blog	O
Joystiq	O
wrote	O
that	O
Deadly	B-Application
Towers	I-Application
is	O
"	O
the	O
most	O
frustrating	O
game	O
on	O
the	O
NES	O
"	O
and	O
"	O
may	O
be	O
the	O
most	O
frustrating	O
game	O
of	O
all	O
time.	O
"	O
</s>
<s>
Even	O
so	O
,	O
he	O
also	O
said	O
that	O
the	O
game	O
should	O
be	O
distributed	O
through	O
Nintendo	O
's	O
Virtual	B-Application
Console	I-Application
service	O
.	O
</s>
