There are many of these games around, this is a trustworty genuine game, but there are many out there that are after your info, so just becareful.
I thought I would try this game as I normally play mafia style rpg's. I gave it 3 weeks, just to be sure it was not my thing, I was right! not my cup of tea.
I can see how it can become addictive though.
I suggest anyone who wants to play a good online game to register for allmafia. Its free to play, no downloads, you just need an email address to sign up.
Use the following link and I will assist you in game. My name is EAST. come find me. Respect.
http://www.AllMafia.com/register.php?refer=EastEnd_Tone