Pre-order for early access.
The War Z will be entering its closed beta phase soon and if you pre-order the game now, you can get in on the action early. Depending upon how much you want to pay, you could get into the beta even earlier.
If you head over to the Official The War Z website, you can pre-order one of three game packages. The Survivor package, which retails for $29.99 but will be $19.49 until October 20th, will get you into the beta, fittingly, on October 31st.
Both the Pioneer and Legend packages will cost you a bit more, but will get you some in game currency, server hosting and guest passes as well. More importantly, these two packages will get you into the beta on October 15th. Not bad.