Fallout Zero

Fallout Zero is a quest mod , complete with its own world
and backstory set two months after the outbreak of the Great War. The mod
includes several new game features: a reactive people helmet, a drivable
metro car, craftable objects, an original basic needs system (hunger, thirst).
The player is teleported to Zero world with a level 1 Character /see walkthrough video to see how to start this mod/,
an empty inventory and the possibility to choose their character’s attributes. After completing the story,
the player is ‘returned’ to the original world of Fallout 3, retaining the
level and attributes their character had possessed before starting the mod.