Halo 2 is a shooting game that is a sequel to the popular shooting video game Halo. Halo 2 was released for Xbox in 2004 and its Windows version got released in 2007. More than 6million copies of the game were sold in the country. The game is played in the first person perspective and there are many campaigns that a player has to complete to level up in the game. There is both single player as well as coop play mode in this shooting game. Some people have experienced problems with the product key as they are unable to start the game. Download Halo 2 PC Product Key Generator here.