Another very interesting exploration of the Quake source is Fabien Sanglard&#x27;[1].  He has done reviews of several of the Id games that have been released.<p>[1] <a href="http:&#x2F;&#x2F;fabiensanglard.net&#x2F;quakeSource&#x2F;index.php" rel="nofollow">http:&#x2F;&#x2F;fabiensanglard.net&#x2F;quakeSource&#x2F;index.php</a>