You begin the match locked inside a narrow alleyway with only one way out. At your disposal you have 500 Jolts and your starting arsenal. Search behind your starting position to find a duffel bag. If you happen to die and return at the start of a wave, you can use this duffel bag and pay a small fee to find the weapons you had on you at your time of death.
The zombies in the first wave are rather weak; some will die from a single hit from a shovel. Save your ammo and beat them to death to obtain bonus Jolts. Try to earn enough to open the nearby gate. Also, consider investing in an M30 or, if you’re alone or your team’s Medic, the Lebenblitz Machine.
The bunker you need to open is easy to spot once you arrive in the village center. It’s the big blast door on the back wall. Unlike many other gates before, however, it requires power to open it.
Activate the two gas valves in the village center. One is on the right as you enter behind the Geistchild Machine; the other one is in an alley to the left (as you’re facing the bunker door). Both valves are worth 100 Jolts to whoever turns them on.
The third valve is behind a gate to the Riverside part of the village; it requires 1,000 Jolts to open. There are three Wichts waiting in an ambush pattern if you pass through the further of the two gates to Riverside. Note that they appear regardless of the wave, so be on the lookout!
The next valve is by the gate to the bridge. It’s worth opening now if you have the time and extra Jolts. The Pub, which is located at the top of the nearby stairs, hosts the crucial Kugelblitz Machine, a necessary upgrade. Also, search for the Combat Shotgun in a weapons locker on the floor below.
With all three valves active, return to the village center and turn on the pilot light near the boarded-up well shaft. Doing so triggers an explosion and forces several Pests out of the open well. When the coast is clear, hop down into the sewers.
This reactivates the gates throughout the village, although you’ll need to open them with Jolts. Most notably, you can now pay 1,250 Jolts to open the door to the Bunker.