SAS: Zombie Assault 2

SAS: Zombie Assault 2 is the sequel to, and the second game in the SAS Series. It was announced on a blog from April 6th, 2009 and later released on June 22nd, 2009.

An expansion, of SAS: Zombie Assault 2,, was announced on July 21st, 2009. . It was later released on August 6th, 2009. Multiplayer was originally planned to be included, but there was "a bunch of potential issues that dragged the timeframe out into the 6+ month sort of area, something [Ninja Kiwi wasn't] quite comfortable with", according to Chris Harris. Later, a full sequel,, was released.

New guns have been added, as well as a much larger map and a new system: Ranks. Each killed zombie rewards XP, which, with enough, increases your Rank. Each Rank has its reward(s). Another change is that, rather than moving into different rooms of the map, they have to be unlocked with in-game money, earned from completing waves and killing zombies. Guns also have to be unlocked, which can be found in different rooms.

SAS: Zombie Assault 2/Insane Asylum Rank & Skills
Rank Unlock Descriptions:

Laser Sights - Projects a red dot on the point of aim. Red dot will show up on a wall or zombie to confirm point of aim.

Radar Scanner - Provides a map for the game that shows accessible areas as green lines, and shows zombies as red dots.

Faster Reload - Decreases time to reload. This is most notable when using automatics. If the mouse is held, firing will commence before the Reload sound completes.

Badassness - Doubles the health of the player.

High Capacity Magazines - Doubles the capacity of every gun.

Sentry Gun Engineer - Doubles the capacity of Sentry Guns.

Witness the Fitness - Increases the movement speed of the player.

Rooms
One of the most notable changes from the first game is the amount of rooms and the way they are accessed. They are:
 * Street
 * Vehicle Bay
 * Workshop
 * Reception
 * Latrines
 * Mess Hall
 * Captain's Office
 * Infirmary