In this game, you are a mercenary contracted by an energy company to investigate the loss of several staff members in the company's Siberian plant. These people have disappeared due to an alien invasion. Your mission is to shoot and kill as many aliens as you can while trying to survive and help the surviving staffers. The game has three different modes. In the Campaign mode, you can choose among different types of extra powers to make your job easier, such as self-healing, learning capabilities, money, and so on. Also, you can choose from a variety of characters, each with their own characteristics. Thus, the mission will be different for each of them, according to their strengths and weaknesses.
In the Survival mode, as its name implies, the aim is to survive the attack of the aliens as long as you can. To do so, you can pick different perks such as weapons, healing devices, and more. Lastly, in the multi-player mode, you can play with other people. This option is not available in the shareware version.
Please note that to play the game, you need to have DirectX installed in your system. If you don't have it, the installation wizard can install it for you.
As I've said, the shareware version has limited capabilities. With the full version, you will have more different weapons to choose, as well as additional difficulty levels and more features. If you like arcade and shooter games, you may like this one.