APEXIO  This looks like a very useful package of sotware -- I'd love to download it, but the download link is broken. Cheers!  
(Version 6.2)

APEXIO  This is a very high quality, well put together game with very good replay value. A cross between Space Invaders, Sim City, and Command & Conquer. I've been trying all the mac games for the last year and this is the most original and fun game i've found so far.

Suggestions: hints and deeper reading material about the game play mechanics. More structures.... walls or moats, more weapons, scenarios. Multiplayer support?  
(Version 1.0)

APEX  If your demo version has expired, you can use this command (in the Terminal) to extend the demo period.

IF YOU DO THIS, PLEASE MAKE SURE YOU COPY AND PASTE IT PRECISELY HOW IT APPEARS BELOW. FAILURE TO DO SO COULD ERASE YOUR DOCUMENTS FOLDER, OR WORSE.

If you don't wish to use the command line, find a utility that lets you see 'invisible' files and then delete the ".nm" folder which is in your Documents folder.

rm -ri ~/Documents/.nm/  
(Version 1.9.4)

APEX  I've used it for at least a year, works great.  
(Version 1.3)

JON DANIELS  No longer uses a Package based installer, its now drag & drop.  
(Version 1.4.2)