Ninjabattles.com has an interesting browser game where you play either a ninja or samurai. Fans of Legend of the Green Dragon will probably like this one as play is sort of similar. You can buy weapons, go on missions, even buy property. You can even attack other players.
I played until my health got dangerously low and decided to logout. A nice bonus to Ninga Battles is that cash prizes are rewarded after each round(100 days) to the best team. I can’t wait to start recruiting my video game friends as I’m sure this will be a hit.

Ninja Battles–Join the Battle!