The Incendiary Grenade in Resident Evil 6 still sports the same design as Resident Evil 5. Up to five of these grenades can be stacked in a single item slot. They appear in both Leon's and Ada's campaigns and are common in availability in Leon's scenario. It is incredibly useful against zombies, since they are weak against fire. A grenade is enough to incinerate a group of zombies and can even kill a Bloodshot.