Alien Shooter

The characters have 4 stats: Strength, Accuracy (better accuracy and damage), Health and Speed. Players can start with a male character (stronger and has more health) or a female one (faster and more accurate).

Alien Shooter is presented in top-down view (3/4 perspective). The game consists of 9 levels with increasing difficulty. The objective of each level is to kill all the aliens. To achieve this, the player needs to access all areas of the level (by reactivating power generators, destroying walls, disabling force fields, etc.) and kill the alien creatures. Later levels have teleportation devices, which spawn enemies infinitely and can only be destroyed by special explosives scattered throughout the level.

The killed aliens drop pickups, consisting of money, health and ammo among other items. Between levels, players can purchase more powerful weapons in a shop. It is also possible to purchase permanent upgrades to the 4 stats. Temporary upgrades can be purchased including "Lives", Body Armor, Attack Drone, etc. Most items in the shop can also be found in the levels.[1]

After contact is lost with an underground laboratory and several failed military assaults, the protagonist is sent to investigate. Upon infiltrating the complex, the player finds it overrun by groub of bio-enginered alien creatures such as : spawn frogs/mutant frogs, multi-armed bipeds (raptors), giant spiders, and the tank rhinos. The cause of problem is discovered to be the experimental teleportation devices thing. Aliens have been pouring through the teleporters and are amassing within the laboratory's confines. As the protagonist goes deeper into the complex, more numerous and powerful aliens are encountered. Eventually, the protagonist successfully destroys all the aliens and teleporters devices in the laboratory.

The final cutscene shows a "single female spawn frog" (alien creature) escaping the laboratory and running away and moving to another place. The story later continued to episode 2 "Fight For Life", and episode 3 "The Experiment".

• Fight For Life : the story take places six moths after the lost contact incident. This was a part when protagonist revisited back again the city after heard that the alien creatures come back, and this time protagonist mission was saving virus in order to kill the alien creatures. The virus was though to be key of demise of those alien creatures, and the protagonist plans to use it.The protagonist was found the virus inside deep laboratorium, but unfornately it was too late because the virus contained was already died and destroyed by alien creatures previously. But in other hand, hordes of alien creatures has been retreat.

• The Experiment : the story take places few days after failure searching the virus. Scientiest from M.A.G.M.A plans to created a new bio enginereed alien species to help them for kill their previous creations. The new alien species creature was successfully created, but they all got berserk and killing their scientiest creators. Again, the protagonist was back again and saving the day again. This time, the protagonist tried to eliminate aliens once and for all. The protagonist eventually success in its mission, the Mutant Dino's (new dinosaurs like aliens) was killed and executed for good. Protagonist alongside with soldiers M.A.G.M.A later rescue the surviving the scientiest, and the DNA sample of those creatures was successfully saved.

In 2012, GameSpot gave it a 6.4 out of 10 rating, writing, "While the game makes good on its promise of giving you aliens to shoot, the end result is very repetitive."[2]

• Alien Shooter: Vengeance
• Theseus – Return of the Hero—Theseus – Return of the Hero was released in 2005. It has new locations, six types of weapons, 10 missions, two modes and purchasable additional gears.
• Alien Shooter - The Beginning—A mobile version of the original PC game that is ported to iOS with new visual effects and elements.
• Alien Shooter Revisited—Alien Shooter Revisited is a remaster of the original Alien Shooter released in April 15, 2009. It features ten missions; 9 weapon types; three game modes; modern visual effects; upgrading with the help of implants; & buying additional gear that carries over to the next level. However, there is less blood.
• Alien Shooter 2: Reloaded—Alien Shooter 2: Reloaded was released in March 14, 2009. Two new missions were added as well as an individual shooting mode called Gun Stand. A mobile version released in April 2020
• Alien Shooter 2: Conscription - Released July 3, 2010. This game was spin-off through Alien Shooter 2 Series.
• Zombie Shooter—Alien Shooter is similar to this top-down shooter and was released in December 29, 2007. It featured ten missions, nine types of weapons, experience points to earn extra skill points for upgrading implants, three game modes and additional equipment to buy. The human race is in danger. Scientists could not stop the threat and became zombies. Crowds of the undead filled the secret research base and the dreadful contagion is about to spread earthwide. The mission is to use the last chance and save humankind from total annihilation.
• Alien Shooter 2: The Legend is a reboot of both "Alien Shooter 2: Conscription" & "Alien Shooter 2: Vengeace/Reloaded" to become more HD Quality and more new modern. It features new aliens, lmissions, weapons, upgrades, and also available is an online Tournament mode. This game has multiple endings. This game was released in 22 January 2020.

• Alien Shooter : TD is new Innovative Tower Defense inspired by legendary Alien Shooter series.The game was created in keeping with the best traditions of Sigma`s games, no concessions of any kind - everything is just like in real life.In this game, you're prepare your own army tactics to eliminate the aliens.This game was released in 13 January 2017.

• Jeff Haynes (15 June 2009). "Alien Shooter 2: Reloaded Review". IGN.
• Sigma Team website