
Three of the maps are for the standard multiplayer mode, and they fit the following basic descriptions:
- Nightfire - Berlin, dark streets
- Knee Deep - lush Pacific jungle
- Station - bombed-out subway platform
The fourth map is called Verrückt, and it's an additional map for the game's Nazi Zombie mode. It will contain additional weapons and a "Perks-a-Cola" machine that you can use to purchase multiplayer perks to help fight off the never-ending zombie swarm.
Also note that it's called "Map Pack 1." You don't name something "1" unless you're thinking about a "2." And that's one to grow on!