- At this link
http://sandywhite.co.uk/fun/ants/
... considered the first isometric game.

heres the same, only in color.
http://www.whimsy.demon.co.uk/antattack/remake.html
and finally heres the 3d remake, I found to suite our more modern tastes.
http://www.urbaninteractive.net/portal/index.php?option=com_content&task=view&id=23&Itemid=43&PHPSESSID=7bc271f798ee69be9cedbaf0daebcd87
-Enjoy