Necro nuke is a weapon in SAS TD. Necro nuke can destroy hordes of zombies and also leaves radiation trail which heavily damages the zombies. Although it has one of the strongest damage in the game, initial shock damage is lower then a necro grenade. A nuke has a large attack radius, making it very strong against swarming zombies but weak against The Ruin (Unless You Use 4 Or 5 Necro Nuke To Kill The Ruin). You can buy 3 necro nukes for 400 SAS dollars.