To Pack-a-Punch your weapon in the Liberty Falls map of Call of Duty: Black Ops 6 Zombies, follow these detailed steps:

### Step-by-Step Guide to Pack-a-Punch in Liberty Falls

1. **Spawn Point and Initial Path**:
– After spawning, you will be on the Pump & Pay Rooftop. From here, you can take two routes to the Pack-a-Punch Machine. Both routes will cost a total of 7,500 Essence in barriers and doors.

2. **Route A:**
– **Step 1: Unlock Barrier 1**:
– Head north from the Motel to reach the locked barrier, which costs 1,500 Essence to open.
– Once accessed, enter into Fuller’s Liberty Lanes bowling alley.
– Inside the bowling alley, unlock the north-west door for 1,750 Essence.
– **Step 2: Unlock Barrier 2**:
– From the bowling alley, head past the bus and up Hilltop Stairs.
– Pass PhD Flopper and reach another locked barrier that costs an additional 2,000 Essence.
– **Step 3: Unlock Dimensional Membrane**:
– From Hilltop, head to the Forecourt of the Church to unlock the Dimensional Membrane, which costs 2,250 Essence.
– Once the Dimensional Membrane is opened, you will have access to the Pack-a-Punch machine with no further steps required.

3. **Route B:**
– **Step 1: Unlock Barrier 1**:
– After jumping down from the Pay & Pump Rooftop, head east to Main Street where two locked barriers will block your path forward.
– Purchasing one of these locked barriers for 1,500 Essence will also unlock the other, so feel free to pick either one.
– **Step 2: Unlock Barrier 2**:
– Run through to the Backstreet Parking area past the bank, where on the left there will be another locked barrier that now costs 1,750 Essence.
– **Step 3: Unlock Barrier 3**:
– After purchasing the locked barrier, follow up the stairs to Washington Avenue.
– Follow the path north to Hill Street, where a locked barrier that costs 2,000 Essence blocks the path.
– **Step 4: Unlock Dimensional Membrane**:
– Now, players will be in Hilltop where the final door at the Church, the Dimensional Membrane, will cost players 2,250 Essence.
– Entering into this Dark Aether area will automatically unlock the Pack-a-Punch machine.

4. **Accessing Pack-a-Punch Machine**:
– Once you have unlocked the Dimensional Membrane, you will find the Pack-a-Punch machine inside the church. It is located at the back of the room.

5. **Upgrading Your Weapon**:
– The Pack-a-Punch machine upgrades your weapon in three stages:
– **Tier 1:** 5,000 Essence
– **Tier 2:** 15,000 Essence
– **Tier 3:** 30,000 Essence
– Each upgrade provides a new visual look for the weapon and increases its damage capabilities.

### Additional Tips

– **Team Play:** If you are playing with a squad, gathering Essence becomes easier since the team can share the cost of unlocking barriers.
– **Essence Costs:** The total cost for unlocking all barriers and accessing the Pack-a-Punch machine is 7,500 Essence.
– **Weapon Upgrades:** Pack-a-Punching your weapon enhances its damage, increases magazine capacity, and gives your gun a unique camo and muzzle flash cosmetic.

By following these steps, you will be able to access and use the Pack-a-Punch machine in the Liberty Falls map of Call of Duty: Black Ops 6 Zombies.