Name some good flash games

[Infinite Citadel]

Similar to: Robot Unicorn Attack in the sense that there's a high score at the end, and not just beating various levels.

RUA: http://games.adultswim.com/robot-unicorn-attack-twitchy-online-game.html 

 

[Lordship]

Runescape? I believe it is a flash game.

 

[Vitaris Liguritio]

Lol, been so long since I have played them.  Tower Defense games were always my favourite.  Sands of the Coliseum was good.