<s>
Nether	B-Device
Earth	I-Device
is	O
one	O
of	O
the	O
earliest	O
computer	O
real-time	O
strategy	B-Application
games	I-Application
.	O
</s>
<s>
It	O
was	O
released	O
for	O
the	O
Amstrad	B-Device
CPC	I-Device
,	O
ZX	B-Operating_System
Spectrum	I-Operating_System
and	O
Commodore	O
64	O
in	O
1987	O
.	O
</s>
<s>
Adding	O
nuclear	O
bombs	O
and	O
electronics	O
modules	O
is	O
optional	O
,	O
however	O
the	O
electronics	O
module	O
enhances	O
robots	O
 '	O
pathfinding	B-Algorithm
.	O
</s>
<s>
An	O
open-source	B-Application
remake	O
of	O
Nether	B-Device
Earth	I-Device
was	O
completed	O
in	O
2004	O
and	O
is	O
available	O
for	O
Windows	O
,	O
Linux	O
and	O
OS	O
X	O
.	O
</s>
