After the third tier is complete you get a kind of mega prize for completing the whole tier, it is an item that is unique and benefits you greatly
By mastering jobs and winning fights.
The "prize" you get from mastering Boss tier in Mafia Wars is an iten which gives you double energy points: Every 3 minutes you get, instead of 1 point, 2 points of energy.
You can get it using rewards points by buying a mafia crate which it might or might not be in.
a 30 second reduction on energy regain
There are no levels in NY after Boss in Mafia Wars. This is why they developed Cuba. Now you can keep on playing but...not in New York.
Finishing all the jobs in that stage: Associate, Street Thug (etc.)
There are different rewards for different cities. Which are you asking about specifically?
you will receive an M16 item that has a very high attack stats.
No
To get the best weapons on Mafia Wars you have to use rewards points to buy them when they have special reward offers. A: or You can get loot from jobs ar-15 is pretty good
Che's Beret is a loot item for Mastering a Level in Cuba. You can only ever have 1 of these.
You work through mastering the jobs, like in new york, cuba, and moscow before.