Here is a list of my favorite games on Flashplayer.com:
 

Tanks:  The most advance Tank War Game ever. Over 12 different types of artillery to choose from. Tanks is packed with tons weapons to choose from like scatter bombs to air strikes, and realistic features like tank fuel, engine sizes and much more.

Hexxagon:  You play as the red diamonds, and your goal is to take over the board by leaping into the spaces adjacent to your opponent's watery globules.

Alpha Bravo Charlie:  In this helicopter recon game, your mission is to pickup the stranded and wounded special-op servicemen returning from missions.
 
Crimson Warfare:  A Starcraft like game, the world has fallen into darkness, now it's up to you to save it.
 
Bullettime Fighting:  You can fight in Bullettime, run up walls and fight against up to 5 enemies at the same time.

Lunar Command:  Save the lunar population by protecting the moon base from a vicious alien attack.

Red Beard:  Help Red Beard master the secrets of the magic spheres to find 15 pieces of Gold.
 
Bubble Trouble:  Shoot the bubbles before they hit you. Play against your friends on same computer or against other players highscores.