Permadeath

In role-playing games, both for tabletop and computer, permadeath (or permanent death) is a gameplay mechanic in which player characters that die are permanently dead and removed from the game and may no longer be used to play. Less common terms with the same meaning are persona death and player death. Games without permanent death may allow characters who are killed to be resurrected to a playable state, with this action often costing resources or undoing progress the player has made.