This article wrote:

The long-awaited sequel runs on an evolved version of the Oblivion engine, although Bethesda says it's reworked the third-person view because of negative feedback from its last role-player.

Fallout 3 kicks off with your birth and your mother's death in a vault hospital. This is where you get to create you character as your father (voiced by Liam Neeson) hands you over to the DNA analyser, before removing his mask to reveal similar traits to the ones you picked.

The battle system in Fallout 3 is called the Vault-tec Assisted Targeting System (V.A.T.S.). You'll certainly be able to tackle enemies in real-time using first-person shooting, the article says, but V.A.T.S. lets you pause time and select a target at your leisure.

This works using action points, which when used up will leave you with only real-time fighting until they charge back up again. If you're not in to all-out killing, Bethesda says you'll also be able to play through the game by being stealthy, or even talking your way out of trouble.