It is a game for persons older than 13 years old.Is named cstrike ,too. Was made after Half Life creation. Choose the speed of your internet connection at installation.You need to register an account online to enter in Counter Strike network. You will be able to play a game only if you enter a CD KEY number available on a CD when you buy a Counter Strike license .Play in multi player mode if you have a valid key.
Choose weapons and team: terrorists or counter terrorists. Guns are grouped in six categories: pistols, rifles,machine guns,shotguns and grenades. Each category have a lot of items available only if you get sufficient points during the battle. Hide carefully and attack enemy surprising them. The sniper is one of the most used gun in this game;also ,AK41 or Kalasnikov have a great fire.
A lot of maps with different situations and terrains can be downloaded from the internet.