In the game files, it is simply called 'Boss'. It then appears 10 waves after that, then 5, then on every wave.
When killed, the Ruin lets out a loud growl. It will also send out four fiery tendrils occasionally that can knock down turrets and soldiers as well as anything on high ground.
Four bombers will drop a steady stream of explosives in a direct line. Typhoon Bomber: The Royal Air Force is here to help.Can be a lifesaver if called at the right time. Longbow Support: This helicopter has miniguns and rocket launchers and will stick around for several waves.Repair Kits: Need your guns back online, like now? These will repair all turrets and heal all wounded in a small area.These are great at killing any zombies that made it past your defense. One of these can kill anything up to Devastators. Necro Grenades: The most powerful grenade ever.Incendiary Grenades: Thermite grenades will burn any zombie to a crisp that manages to survive the initial blast.It can freeze smaller zombies to the ground and will slow bigger zombies to a crawl. Cryo Grenades: Liquid oxygen in a bottle.er.These items can turn the tide of battle when the going gets rough. Premium items are bought using SAS Dollars or found in support crates sent every five waves.