been playing cs here since it was first in beta which was like late 1999 and early 2000...
so, since counter-strike is the worlds most played online game ever! i suggest getting just half-life retail, DUH of course cause you cant play any day of defeat or cs with out it,also the other mods that are kinda cheap and stupid..but dod and cs is the best.... just download the upgrade for hl when you get the half-life cd and then download cs mod version at
http://www.fileshack.com or
http://www.fileplanet.com or
http://www.blueyonder.co.uk and get the dod 1.0 at
http://www.blueyonder.co.uk or
http://www.dodmod.com ,
http://www.dodhq.net
aka_Eshelmen