SAS: Zombie Assault 4 Lore

For lore on other games in the SAS Series visit it's article N/A.

Storyline
In the year 3104, aboard the Kurios Space Control Station in Thera System, an unknown virus has infected most, if not, all humans. At Bay 10, Military Space Shuttle Mantis 12 is unable to leave due to malfunctioning ramps. As a result a team of SAS forces begins to defend the rear of the shuttle. Eventually, the SAS manages to takeoff, but not before being attack by a mutated boss zombie, which in-game, changes depending on your character level. When the SAS finishes clearing the shuttle, it departs.

Meanwhile, upon hearing of the news about the virus, dubbed the Thera Virus, the president begins to address worried citizens that all will be taken care of. While on TV, an intelligence officer orders the same SAS team from the Aartis system to recover a vaccine on Thera discovered by Combot, an AI designed for emergency defense, in order to stop an outbreak on Aartis, one of the known planets where the human race resides. Since the president's address to the people, he has also approved of signaling the Jolt Ship in Thera's orbit to fire its WMD to destroy the entire planet, since there were no signs of life at the time. The team has only less than 15 minutes to retrieve the vaccine and get out alive before they are destroyed along with Thera. The team of SAS fights their way through a subway station to reach a train, which leads to a lab containing the Vaccine. Once they retrieve the Vaccine, the team manages to shoot their way through a crowded street filled with all sorts of zombies, including another mutated boss zombie(s).

After retrieving the vaccine, the SAS Team boards a dropship and departs. A few moments after the SAS Team departs, the Jolt Ship destroyed the planet, killing all the zombies on it. Combot then orders the team back to Aartis System since the virus has reached a heavily populated planet of Aartis. There, citizens have barricaded themselves in, but they won't last long with the hordes of zombies abound. The SAS are then ordered by ComBot to rescue as many survivors as possible and neutralize any zombies in the area, including survivors who become infected. After rescuing any survivors in the area, the SAS are attacked by another boss zombie.

Upon rescuing civilians, the SAS team are soon briefed about Combot suddenly becoming compromised as the Virus has become a digital pathogen. The SAS arrives at a market area as there are pods that seems to be harvesting humans and mechanical parts, all of which contain either zombies or drops. While fighting through the area, the SAS discovers a Purge nest spawning zombies. When they reach the other parking lot, the SAS discover a Minion Egg. Four minion eggs surround a much larger boss egg, and each minion egg releases a large group of powerful zombies when destroyed. When the SAS Team approach the Boss Egg, spikes emerge from the ground beneath their feet in an attempt to impale the SAS Team. After destroying the Boss Egg, a Boss Zombie emerges, which is dispatched by the SAS team.

Soon, the SAS are guided to a mansion overrun by zombies with a VIP inside. After searching various hiding spots in the mansion, they finally locate the VIP. He is quite whiny as he will call out the SAS team for picking up a droppable item he claims belongs to himself. Eventually reaching the landing zone, the SAS and the VIP notice that Zombdroid Servants and Zombdroid Soldiers are attacking the group. If the SAS manages to hold off the Zombdroids, the VIP will say in relief to get out of there. If the SAS manages to hold off the attack, but the VIP's health is half-way down, the VIP will complain how he is "half-dead".

The SAS are then sent on a mission to a hospital without power. The only way to restore its power was through switches throughout underground tunnels. The SAS go through the zombie-infested tunnels and turned on the power, but Combot activated four Zombie Turrets and, later, one or more Loaderbots. The SAS must battle these enemies to complete their mission.

Later, the SAS are sent to a city that was partially barricaded. Remaining survivors of Aartis are awaiting extraction, but zombies are swarming too quickly to set up barricades. The SAS must defend the city from zombies swarming in from the places without barricades. The mission consists of eight waves, each one increasing in difficulty. The SAS cannot let more than 25 zombies through the lines of defense. There is a final boss at the end.

Afterwards, the SAS are sent to Boreas to investigate why communications were lost at the ice station. They are greeted by some HVM mercenaries who helped defend the recovery station. After defending from a few waves of zombies, the HVM soldiers destroy the ambulance the infected refugees have been placed into. A fight breaks out and after the HVM mercenaries are defeated, the facility is overrun, forcing the player to escape in a truck. The player defends the truck from attacking hordes of zombies, but it is hit by an avalanche, killing the driver and forcing the player to fight a final boss alone on foot.

The next mission continues on Boreas. The SAS soldiers see thermal heating coming from Boreas' nuclear plant and are forced to shut down the nuclear vents. After a reactor is shut down, the countdown resets to five minutes before the next nuclear reactor starts its countdown. After all three are deactivated, the character goes to the main computer to shut down the system resulting in pitch black for a couple of seconds. When the lights turn back on, the player is greeted by multiple bosses instead of one or two bosses, plus a horde of zombies.

Onslaught
The SAS team begins by defending a shuttle which is stuck in an infected space station while the pilot fixes the ramp doors. After about six minutes, the team faces a mutated zombie(s). As soon as the zombie is eviscerated, the team leaves the Kurios station.

Vaccine
Meanwhile, as the team is gearing up for their next mission, an intel officer order the men to collect a vaccine found on Thera by Combot, their AI regarding the defense of the Federation. However, the president address to the public is also a signal for a Jolt Ship to launch their nuclear missile to destroy Thera. As a result, the SAS has less than 15 minutes to retrieve the Vaccine and get on the Dropship. A few moments after the SAS Team leaves, the Jolt Ship destroys the planet.

Survivors
On Aartis, Combot receives transmission of a SOS coming from a heavily populated city. The team is then sent to the city and eradicate all zombies on site. If any civilian are infected, they are to be shot on site. After rescuing the civilians, the SAS fight a mob of zombies and a boss zombie(s).

Zombie Pods
The SAS are then informed that Combot has been compromised. With that said, the team are sent to a market where they encounter purge nests. Also, while on the mission, one of the SAS says how there's still twinkies. Soon after destroying the nest, the team encounters five pods in the parking lot. Regardless of whether the team destroy all the minion pod, remaining pods suddenly explode and releases all the zombies found inside.

V.I.P
Soon after Zombie Pods, the team is then sent to a mansion where a VIP is located. The team objective is to retrieve the VIP and evacuate the area alive. The team enters the mansion and kills any zombies found inside. When the team finds the VIP, the operatives seemingly starts to regret rescuing the VIP. When a operative acquires any loot with the VIP with them, the VIP will say that the loot belong to him, resulting in the operative ready to shoot the man down. While fighting the zombies, the VIP notes that his robotic servants are acting weird. After the robotic servants are destroyed, a helicopter arrives to evacuate the VIP and the SAS.

Power Out
After evacuating the whiny VIP, the team are sent to an underground facility, to reactivate power to a Hospital. While the SAS was activating the power, they discover 3 deceased SAS Soldiers. It is unknown whether those 3 soldiers died by the infection or were eliminated by Combot. During the Mission, the power activated automatic turrets, Zombdroids and Loaderbots.

Last Stand
Although power is back online, Aartis is nearly over run by the zombies, the team has to evacuate the planet. A swarm of zombies were swarming the place - there was no time to barricade the entire city. As a result, the SAS Team fights against multiple waves of zombies without letting more than 25 zombies get past them. Finally, the Helicopter arrives to evacuate the civilans and the SAS Team.

Ice Station
This content is exclusive to the flash edition.

Following the successful evacuation of Aartis, reports of another outbreak, this time on the icy mining colony of Boreas. Unwilling to take chances, the government sends mercenaries from HVM to assist the locals before sending the SAS in. However, it seems that the mercenaries (or potentially HVM) have ulterior motives, for after helping the SAS protect survivors from the zombies, the mercenaries murder the survivors and attempt to kill the SAS team, stating that "there can be no witnesses." After killing the mercenaries, the SAS squad evacuates by truck. Defending the truck from the incoming zombies, the SAS helped the driver by blowing up vehicles that blocked their path. Momentarily foiled by a collapsed building blocking the road, a member of the team pointed out an alternate route. This route worked - to a point, when an avalanche demolished the truck, presumably killing the driver and depositing the team into the middle of a horde of zombies and the abomination that led them. After a tough fight, the team emerges victorious.

Meltdown
This content is exclusive to the flash edition.

Following the Ice Station incident, the SAS team receives information of a malfunctioning nuclear power plant. They enter and have to manually power off 3 reactors, each in less than 5 minutes. The plant's door system has gone haywire and zombies are spawning from the floors trying to prevent the team from saving the planet from fallout. After the reactors are powered down and the main computer is restarted, a boss fight ensues as they try to kill the soldier. When the zombies are all dead, the team emerges victorious after a 20-second countdown.

Trivia
N/A