A quick search in Google shows that there are several gaming sites which target the word "free" when in fact they are paid services, not only do they advertise to the wrong market they make things difficult for the surfer who has a few minutes to spare and wants to have some fun during his / her leisure time.
Today's gaming world has evolved from the stand alone console mentality into the vast world of the net, gaming applications which were popular back in the late 90's and first few years of this decade have now become or any kind of fee. This is definitely a gamer's heaven. Popular free games such as Pokemon, Super Mario, Donkey Kong, have all invaded the net with their action / strategy scheme but a game which became an all time classic due to the animation it is based on is Dragon Ball.
Dragon ball is an successful animation which was launched in 1986 in Japan, it was based on the manga adaptation by Akira Toriyama who developed this action packed story into hundreds of half hour episodes. The main characters of the original series are Goku, Bulma, Roshi, Kuirin, Piccolo, etc. The story revolves around the fact that Goku is a powerful fighter who encounters many skilled opponents in ninja tournaments which turn out to be quite spectacular by the display of powers.
On later episodes, Goku meets his rival and future friend Vegeta who just like himself is one of the few surviving Saiyans who survived the destruction of their home planet by fleeing from it to distant planets. The battles are fierce and Goku fights to protect earth becoming stronger each time. His special abilities are: super strength, super speed, teleportation, energy blast (kamehameha), super Saiyan (2,3,4)
Because of its popularity many dragon ball games were made available to online communities where Goku has once again to take on Vegeta, Freezer and the many foes he bought in the anime series. The popularity of this game grew as several versions were released to cover the characters introduced in later seasons such as Dragon ball Z and GT.
The online version called Power Levels is just one of many which shows Goku in super Saiyan mode fighting against a strong Vegeta another free online version of the game is called "dimension" where you have more flexibility to choose the fighters, in this version you can fight as Piccolo, Gohan or Goku and your opponents can be Cell, Vegeta or Freezer. Whoever you decide to battle remember that free game versions of this great saga are waiting for you all over the web.