Blood of the 13th Hour is a New 2008 / 2009 First Person Shooter Computer Game For Windows 95 and later... The Game is based off of the famous Atari Game " Blood " The Game and Engine was created Using The Linux Doom Source and ported to the Windows Operating System... The Game is Commercial and Sales For $19.95 - The Complete Source Code is also available for buy at a fee of $150.00 - You Can Download The Try Before You Buy Version