Rebecca's death is a possible cutscene in Resident Evil. This scene is triggered if the player - Chris Redfield - does not save Rebecca from the Hunter in time. Receiving this scene means that the research facility will not self-destruct.
Chris hears a scream while he is searching in Spencer's office. Rebecca is shown under the staircase and on the floor, pulling herself away from an oncoming Hunter, who forces her to the corner. Strike one, Rebecca is injured. The Hunter prepares its claws for a swift kill. In one fast movement of its arm, Rebecca is decapitated. Her dying scream is heard by Chris. After finding her corpse, he gives out the cliché dramatic death line of "REBECCA!".