I've not tried all 36 of these games, but I can recommend Ultimate Defense 2 for the tower defense fans. This site will keep you busy having fun for quite a while.
Free Strategy Flash Games
Over 30 free online strategy Flash games
From Lee Seats, former About.com Guide
I'm usually not a strategy game fan, but I do like some of the tower defense type games. If you happen to like strategy games you are sure to find something to help you waste some time on the Strategy Flash Games site.
Explore Freebies
Must Reads
About.com Special Features
Holiday Central
What to eat, where to go, fun things to do and how to save money on the perfect gifts. More >
Scrapbook Technique Gallery
Use these ideas to inspire your own uniquely beautiful pages. More >
©2009 About.com, a part of The New York Times Company.
All rights reserved.