<s>
Koutetsu	B-Application
Yousai	I-Application
Strahl	I-Application
( 鋼鉄要塞	O
シュトラール	O
,	O
Steel	O
Fortress	O
Strahl	O
)	O
is	O
a	O
horizontal	O
scrolling	O
Shoot	O
'	O
em	O
up	O
developed	O
by	O
UPL	O
in	O
1992	O
.	O
</s>
<s>
In	O
Japan	O
,	O
Game	O
Machine	O
listed	O
Koutetsu	B-Application
Yousai	I-Application
Strahl	I-Application
on	O
their	O
March	O
15	O
,	O
1992	O
issue	O
as	O
being	O
the	O
eighteenth	O
most-successful	O
table	O
arcade	O
unit	O
at	O
the	O
time	O
.	O
</s>
