Tropic open land island like the one from lost. I have a complete story line made for it and your easter egg has to do with Atlantis.

[ChrisDovico]

Your on a secret island modern day where rictoffing has teleported you have the moon insistent and, it's a large island no tight corners and your objective is to fix this submarine and the parts will be scattered around the island and once your done with you will use the sub and you will become under attack by the cracking which you have awoken after the nukes droped on earth and he will sink your sub into the lost city of Atlantis where you will 1. Fix Atlantis to bring it to surface and 2. Defeat the cracking. (Now Atlantis is know for having advanced technogly and in this map dempsey,rictoffing,nicolie, and takeo must build a super weapon to defeat the cracking.) That's my story line idea + Easter egg and l would like to see that as a future zombies map.