Yes it's a hardcore feature, your companions CAN die to the enemies. But there are various other ways that companions can die. They can be killed while they are not your companions. So, before getting them, or after dismissing them.

There are also some reports that companions can be killed in casual mode by doing massive damage to their bodies when they are knocked down. This is probably a bug.

Yes it's a hardcore feature, your companions CAN die to the enemies. There are various other ways that companions can die. They can be killed while they are not your companions. So, before getting them, or after dismissing them.

There are also some reports that companions can be killed in casual mode by doing massive damage to their bodies when they are knocked down. This is probably a bug.

Yes it's a hardcore feature, your companions CAN die to the enemies.

Not listed on the wiki but I've confirmed it while playing hardcore.

http://fallout.wikia.com/wiki/Fallout:_New_Vegas_companions

Yes it's a hardcore feature, your companions CAN die to the enemies. But there are various other ways that companions can die. They can be killed while they are not your companions. So, before getting them, or after dismissing them.

There are also some reports that companions can be killed in casual mode by doing massive damage to their bodies when they are knocked down. This is probably a bug.