Fancy pants
Probably one of my favorite flash games (might be heavily based on nostalgia). There are three games so far. Personally the second is my favorite.
http://www.miniclip.com/games/fancy-pants-adventure-2/se/
http://www.miniclip.com/games/fancy-pants-adventure-2/se/
Mardek
An amazing flash RPG-series. However it was never finished. Only three chapters exist but they are all wonderfull http://www.kongregate.com/games/pseudolonewolf/mardek-rpg-chapter-1
Rise of a knight/King
Two fantasy adventure games about a knight and his quest to save the princess and the kingdom. Rise of a knight isnt that good but its a nessesary prequel to rise of a king.
http://armorgames.com/play/1006/the-rise-of-a-knight
http://armorgames.com/play/2027/the-rise-of-a-king
http://armorgames.com/play/1006/the-rise-of-a-knight
http://armorgames.com/play/2027/the-rise-of-a-king