Zombie Assault 3 is a Flash Game and your dream come true, survival of a Zombie take over, single, 2 player + multiplayer options. Now with cryo grenade. Kongregate free online game SAS: Zombie Assault 3 - Fight off the horde in the awesome sequel to SAS2. This time more maps, more guns. Sas: Zombie Assault 3 has been updated and now looks and plays much better than is shown in the video.