Defense

http://armorgames.com/play/12141/kingdom-rush The best tower defense game I have played. A must play for everyone.

http://www.addictinggames.com/action-games/defendyournuts.jsp Defend your nuts! Play as a squirrel, upgrade your weapons, and defend your nuts!

http://www.addictinggames.com/strategy-games/top-defense-game.jsp - Awesome TD game where you manually control firepower and fire at the enemy.

VECTOR TOWER DEFENSE:     http://www.candystand.com/play/vector-td

http://www.onemorelevel.com/game/bowmaster – It involves strategy and patience. Aim well…

http://armorgames.com/play/6987/age-of-defense – Like Age of War

http://www.kongregate.com/games/pcde/pc-defense – I like it!

http://www.addictinggames.com/shockdefence.html – Not the best, but ok to pass time

http://www.ninjakiwi.com/Games/Tower-Defense/Play/Bloons-Tower-Defense-4.html – This is the last game of the all famous Bloons Tower Defense Series. You mest defend a path with monkeys, canons, pineapple bombs, planes, battleships, spikes, and boomerangs. It is another free game.

http://onemorelevel.com/game/when_penguins_attack- A surprisingly fun Tower Defense Penguin Game. It’s hard to earn money, and a challenge. Kill the penguins!!!

http://onemorelevel.com/game/shape_invasion- This is a very easy game where you shoot down shapes. If you hate Geometry, it’s perfect. Things don’t get hard until Level 20, but it’s worth the wait. It’s very metiocore, but still a Fair game.