Alright sweet :D, I will be sure to install both 2 and 2 OA so i can run Combined Operations :)
Alright, It seems Arma 1 would be the one for me, Tactics doesn't sound appealing to me in any way. I don't care much for strategy games.
Thank you for the information :)
Just leaves the DayZ information, Still not sure what the DayZ mod does..