I don't know the address, but here's two different sets of directions that people got:

1 - Wicked West games are held @ Nanakuli Ranch which is in Waianae. If your coming from Honolulu side, get on H1 heading south. Follow it all the way to the end of the freeway. It turns into Farrington Highway. Your are now headed into Nanakuli(not @the ranch yet).

Anyway follow that road and stay in the farthest right lane. Just keep an eye out on the left side of the road(ocean side). Look for a concrete bridge(still under constructions I believe). Maybe 10minutes after u get off the free-way. Once you see that slow down immediately! Take the very next right after the bridge. There will a white fence and a large sign that says Welcome to Nanakuli Ranch(easliy visible from the road). If you hit a McDonalds youv'e gone too far and should backtrack.

It is a flat dirt road(no need for 4 wheel drivin). Follow that road and be sure to keep to the speed limit (5mph). Follow it ALL the way in. Just go straight, it is very far in. When you see people dressed in camo and carrying replica weapons youll know your there. The place will look like this but be way more packed with cars.

2 - On the H1 after you get past the water park and Ko'olina you are going to drive for about 10 minutes without any more stoplights. Keep driving and when you get into Nanakuli look for the very first stoplight. When you pass the first stop light, count 4 yellow fire hydrants on your right side. Turn right after the 4th hydrant into Nanakuli Ranch.

Here's the address to the Macdonalds close by to get your GPS headed in the right direction:

87-2028 Farrington Hwy, Waianae, HI‎

Hopefully that helps.