OK this looks fukin amazing, thank god for MODS!!!!
If you havent already got ARMA2 the free version will suffice, along with the Operation Arrowhead add on, ?14.99.
1. DL Arma free via steam
2. Buy and DL Operation Arrowhead
3. Go to the Arma Free folder, Copy the 'Addons' folder
4. Go to the Operation arrowhead folder.
5. Paste the Arma Free Addons folder into the Operation Arrowhead folder, merge with a possible existing Addons folder, if its in there.
6. Download all the Dayz mod files. Put them ALL in a folder called @dayz, put this folder into the Operation arrowhead folder.
7. Go to Steam, Operation Arrowhead launch properties, add this line: -mod=@dayz
8. Launch Arrowhead, you MUST select Combined Operations, game launches.
9. Confirm mod has loaded by checking the top right of Arma menu screen, should just say @dayz up there.
10. Kill Zeds.
Working on a server now...without breaking ph33r...
http://www.youtube.com/watch?v=wjWFv1CUa6Y