DigitalBattle.com

Valve has finally released lifetime retail sales figures for some of its most popular games, including the Half-Life and Counter-Strike series. The sales figures reveal that the studio has sold over 32.8 million copies of their games since their first title back in 1998.

Interestingly, sales from Steam is not included in the below list, so the figure is actually much higher. The following numbers are also sales on only PC, not taking into factor console sales, and were published first in Game Informer and then on Gamasutra.

Here they are:

• Half-Life (Valve) / 1998 – 9.3 Million
• Half-Life: Opposing Force (PC, Gearbox) / 1999 – 1.1 Million
• Half-Life: Blue Shift (PC, Gearbox) / 2001 – 800,000
• Counter-Strike (PC, Valve) / 2000 – 4.2 Million
• Counter-Strike: Condition Zero (PC, Valve) / 2004 – 2.9 Million
• Counter Strike: Source (PC, Valve) / 2006 – 2.1 Million
• Counter-Strike (Xbox, Valve) / 2003 – 1.5 Million
• Half-Life 2 (Valve) / 2004 – 6.5 Million
• Half-Life 2: Episode One (PC, Valve) / 2006 – 1.4 Million
• The Orange Box (Valve) / 2007 – 3 Million