Counter Strike is a first-person shooter (FPS) action game developed by Valve Corporation and released in 1997. It is the best-selling FPS game in the world, and has been regarded as a revolutionary game.

You are a member of a special elite squad, the Counter Terrorist Strike Team (CTST), and your mission is to destroy terrorist organizations that have formed in various locations around the world. In order to achieve this, you must perform stealth missions, in which you must avoid detection by the enemy, while completing the assigned tasks.

The game is set in several locations, including an urban environment, a jungle, and a desert. The weapons you can use in the game include rifles, shotguns, machine guns, sniper guns, grenade launchers, and rocket launchers. You can use a variety of different guns, each of which has its own unique properties.

The game's main storyline is based on a series of missions. Each mission consists of an objective, which must be completed in order to progress to the next one. These objectives often require you to complete a stealth mission, while also fighting against enemies.

As you complete missions, you will gain experience and level up. This experience is used to level up your skills, as well as increase your health and ammunition.

When you die in the game, you will lose a portion of your health. If you lose all of your health, you will die. However, you can still survive in the game if you have enough ammunition.