Guild Wars 2

They’re an extremely young race, I know, but does anyone know how long their natural life span is? This made me think after seeing Riannoc be the first Sylvari to die. It looks like to me that they won’t ever die by natural causes, so long as they don’t get killed in combat, or get attacked by a swarm of locusts.

As they are so young, no one knows how long they live

As Lorelei said, we only know that they can live 25-26 years since that’s how old the oldest are, currently. How much longer, we have nothing to go by.

I’ve always figured that they might age like trees. As such, it’d then be possible to pull off centuries, if not millennia. I could, however, be absolutely wrong. If I’m right, it’d give the game a “long-lived” race … and most RPGs tend to have at least one of those.
/shrug