What do I need to play exactly?

[Prevail 8]

Do I 100% NEED Arma II and CO?

Is there just one I need, or could just use? Or do I have to spend the $30 - $40.00 for both of them?

[Bianca 92]

http://www.dayzwiki.com/wiki/How_to_install_DayZ

[Prevail 8]

Is there a real main difference between the free version and the paid one? (I will be buying the paid one fairly soon of course.)

[davidwomacks@gmail.com 2]

I have arma 2 but not arrowhead if I buy arrowhead can I use dayz or do I have to buy CO

[Believil 8]

If you have Arma 2 just buy Operation Arrowhead if you have neither just buy CO.

Edited August 5, 2012 by Believil

[smiffotw@hotmail.com 2]

What do I need to play?

Patience.

[ApriL 28]

Buy this: https://store.bistudio.com/arma2-combined-operations-steam-version

That is Combined Operations, it is the only thing you need to buy to play DayZ

[Prevail 8]

^ I'm buying the steam version.