Valve is now offering Half-Life for just 98¢ in celebration of the 10th anniversary of the company's debut title. Launched 10 years ago today, Half-Life was greeted with overwhelming review scores (Metacritic of 96%), earned over 50 Game of the Year Awards, and birthed a franchise with over 20 million units sold to date. The special 10 year anniversary price is available via Steam until 12:01 pm PST on November 21. For more information or to purchase Half-Life for 98¢, please visit www.steamgames.com.