I'm really happy to be once again working on twisted fairy tales. And I'm especially excited about having R.J. Berg involved with the project. He was the Executive Producer on Alice and that project's head writer. On Grimm he's serving in the same role, which means you can expect more beautifully written story and dialog.
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.