Can i play DayZ if i use Arma II free and then buy an op arrowhead from steam and then download dayZ install Tool? Reason I: don't want to buy combined ops, coz i want to play just dayZ, not arma II. Reason 2: I dont want to buy combined ops for 30euros to play JUST Dayz and at the december buy the DayZ for about 15euros. I'm sorry for my verry bad english...