<s>
The	B-Application
Dreadnaught	I-Application
Factor	I-Application
is	O
a	O
scrolling	O
shooter	O
written	O
by	O
Tom	O
Loughry	O
for	O
the	O
Mattel	B-Operating_System
Intellivision	I-Operating_System
and	O
published	O
by	O
Activision	O
in	O
1983	O
.	O
</s>
<s>
It	O
is	O
one	O
of	O
several	O
Intellivision	B-Operating_System
games	O
developed	O
at	O
Cheshire	O
Engineering	O
for	O
Activision	O
.	O
</s>
<s>
Atari	B-Device
8-bit	I-Device
family	I-Device
and	O
Atari	B-General_Concept
5200	I-General_Concept
ports	O
followed	O
in	O
1984	O
.	O
</s>
<s>
Each	O
dreadnaught	O
approaches	O
the	O
"	O
Galactic	B-Application
Unstable	O
Energy	O
Field	O
,	O
"	O
which	O
acts	O
as	O
a	O
defensive	O
line	O
.	O
</s>
