Template:Featured article/Fallout: New Vegas/23
Hardcore mode is an optional gameplay mode which introduces new, challenging aspects of survival into the game.
In this mode, the Courier must stay hydrated, eat periodically and have a regular sleep cycle. stimpaks and RadAway work over time rather than instantly, and to restore critically damaged limbs, you must use a doctor's bag, hydra or visit a doctor. Finally, ammunition has weight, so you can only carry a limited amount. In addition, recruited companions can die permanently, whereas they are only rendered unconscious in casual mode.