Alien Shooter is an isometric top-down shooter video game developed and released by Russian studio Sigma Team in 2003. It is the first title in the Alien Shooter series to be followed by Alien Shooter: Vengeance. Alien Shooter has two expansions, Fight for Life, released on June 14, 2004 and The Experiment, released on September 22, 2004, each of which has five new levels and include the conclusion to the Alien Shooter story.
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.
