The third-person shooter PC action game Alien Shooter was created by the Russian "Sigma Team" released in 2002. It has two expansions, called "Fight for Life" and "The Experiment". Both addons include 5 more levels, the second one also has one final boss and 3 difficulty settings that dictate the number of aliens (easy has the least, hard has the most).
The story is simple: the year is 2025. A research facility somewhere has been overrun by aliens. A portal has opened deep down in the building, and strange creatures pour out of it, devouring anything and anyone in their path. You are a mercenary, called in by the army. The situation must be contained, no alien is to escape out of the facility. You have been granted access to the latest weapons and armor. Just do your job right. The player can move the character by pointing and right clicking or with the arrow keys. Players aim the weapons with the mouse and fire with the left
click. Although just playing with the mouse is possible, it is extremely difficult to retreat and fire without using the keyboard. Swapping weapons in the inventory can be accomplished with the mouse scroll wheel or with the number keys.
Alien Shooter plus addons features a total of 20 Levels spread across 3 campaigns. When a player completes a level, he may purchase implants, ammunition, weapons, or armor. There is also a Survive mode that keeps spawning more and more monsters until the player is eventually overrun. (Wikipedia)
CHEATS Enter one of the following codes at the indicated screen to activate the corresponding cheat function.
Codes
Level skip Game play - cheate
1000 HP Game play - cheath
All weapons Game play - cheatw
1,000 additional ammunition Game play - cheata
50,000 additional money Shop - cheatm
Here is a nice little trailer supposedly played without cheats. Yeah, right!