This is the very best component pack for COD Zombies I could ever come up with in Vanilla Minecraft. This requires a good understanding of minecraft and its commands in order to put these parts into effect. It includes:

1. Mystery box
2. Speed cola
3. Juggernog
4. Quick revive (solo)
5. Zombie spawner round system
6. A point system with a UI
7. A working door system, but I have a much better method at the end of this description please read
8. A MOON GRAVITY MODE

This is made for people who want to create a zombies map in minecraft. The world I linked has all of the components. I recommend worldedit to copy and paste them in your map. I also recommend a gun mod such as flans mod.

Some of the components are from other sources. This is just all of the required parts put into one world.

FOR DOORS: JUST USE THE SAME SYSTEM AS PERKS, BUT USE IT TO SET BLOCKS TO AIR IN SPECIFIC COORDINATES. UPON DEATH AND RESPAWN, MAKE SURE THERE'S A COMMAND YOU LAND ON THAT RESETS THOSE BLOCKS TO THEIR ORIGINAL BLOCK.