Locations within the SAS: Zombie Assault series function differently between each game.
In SAS: Zombie Assault, the game takes place on a single map entirely within a small building with three rooms.
While the concept of a single map was reused for SAS: Zombie Assault 2, the size of the map was increased dramatically. It takes place in an abandoned military camp and is divided up into various areas which players can purchase access to via in-game currency. Within these unlocked areas are silhouettes of new weapons which players can then purchase. The concept was used again in the game's expansion, SAS: Zombie Assault 2 Insane Asylum which, like its name suggests, takes place inside a large insane asylum.
SAS: Zombie Assault 3 was the first game to scrap purchasable areas and a single large map in favor of multiple smaller maps of varying size. Players can maneuver freely throughout each map without having to purchase access to other areas. Currently there are 5 maps available in the browser version of the game and 15 maps available in the iOS/Android version. The 5 maps in the browser version take place in various locations throughout Europe. The additional 15 maps in the iOS/Android version take place in various locations throughout North America, Russia, and Asia (five per area).
The browser version of SAS: Zombie Assault 3 only contains the European maps. The iOS/Android version of the game contains maps from Europe, North America, Russia, and Asia. South America, Africa and Australia cannot be accessed since they're still supposedly being developed, though the lack of updates makes this seem unlikely.
Europe is the first region, and thus is not locked at all.
North America requires Rank 10 to unlock.
- The Office
- Dead End
- Forsaken Asylum (downloadable)
- Civic Center (downloadable)
- Zomb-o-Mart (downloadable)
Russia requires Rank 15 to unlock.
- Institute (downloadable)
- Cemetery (downloadable)
- Sewers (downloadable)
- Railway Station (downloadable)
- Dig Site (downloadable)
Asia requires Rank 20 to unlock.
- China Town (downloadable)
- Pagoda (downloadable)
- Sweat Shop (downloadable)
- Bamboo Thicket (downloadable)
- Skyscraper (downloadable)
SAS: Zombie Assault 4 takes place in the future, and features locations at places other than Earth.
- Zombie Pods
- Power Out
- Last Stand
- Ice Station (PC only)
- Meltdown (PC only)
Note: All maps have at least one secret area that will have either loots or Strongboxes.
If you look at the picture, you can see there are 2 planets that are currently still hidden behind Boreas. As of the May 27, 2016 Ninjakiwi Blog, however, NK has confirmed that there will be no more new maps and missions coming to SAS 4. It is currently unknown whether they will remove the maps or not.