Sillysoft is having a bundle sale on four games that are similar to Risk or A&A.
$5 USD to support a company that makes games for linux was too good to pass up. You can install on Windows, Mac and linux at the same time. To play MP you need separate registrations though.
http://sillysoft.net/
Yep, I jumped on them too for that price.
Why the heck not! I like the style of these games and they are simple and quick fun.