Ladies and gentlemen, welcome back to another Black Ops 7 Zombies guide! Today, we’re diving into a super effective round 100 strategy in Astromeorum, part of the new Listkeepers Challenge LTM. Whether you’re chasing the round 100 Dark Ops calling card, grinding XP, or leveling up your weapons, this guide will help you maximize efficiency and success.

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Setting Up the Strategy

To start, activate a free Fire Gobblegum, pause the game while it’s in the air, and swap to another pack. If the bottom-right corner shows double points consumed, you’ve performed the glitch correctly and now have infinite ammo.

Next, purchase Quick Revive and open the first door. Start collecting essence to buy Speed Cola. Your goal is to acquire four perks in total so that you can use Wonder Fizz and aim for PhD Flopper.

Although this setup works best with a crossbow, you can use any weapon — LMGs, ARs, or anything you prefer. Infinite ammo will make farming XP and weapon levels much easier.

Perks and Upgrades

Perk Two: Pick up Speed Cola.

Perk Three: Head to the Luminarium and collect essence for Juggernog.

Perform a rarity upgrade for slightly better damage output.

Perk Four: Grab Mule Kick near the Pack-a-Punch room.

While running this strategy, remember to pick up as much salvage as possible. You’ll need it to upgrade weapons to legendary rarity, especially if you plan on reaching higher rounds.

Essential Equipment:

Ether Shroud: For traveling through frozen areas.

Extension Augment + Extra Charge: Longer usage duration.

Optional: Cryofreeze for extra utility.

Pack-a-Punch and Grinding

Set up near the Pack-a-Punch room for easy access to weapon upgrades and perks. Upgrade your crossbow to Pack 3 Legendary, which can deal over 55,000 explosive damage — enough to clear zombies efficiently even at very high rounds.

For essence farming, shoot at the bottom of the stairs while standing in your safe spot. Pick up salvage between rounds, upgrade weapons, and collect rare gobblegums to maximize efficiency.

XP Farming and Efficiency

For XP farming, it’s recommended to reset from round one around round 36 for optimal hourly efficiency. Using this setup, round completion is extremely fast — in our test, we reached round 27 in under 21 minutes, making this one of the fastest strategies available.

Once your weapons and perks are fully upgraded, you can AFK in your safe spot while your crossbow clears zombies automatically. By round 100, you’ll have accumulated substantial XP and weapon progress.

Final Results

Using this strategy:

Reached Round 100 in 1 hour and 37 minutes.

Achieved 12,411 eliminations.

Leveled from 53 to 55, with crossbow level reaching 250.

Completed Speed Cola research and collected various gobblegums and rewards.

This method is highly efficient for both XP and weapon progression. While you can replicate this with other weapons (without AFK), the crossbow setup makes high-round farming extremely accessible.

The Astromeorum Listkeepers Challenge LTM offers an incredible opportunity to farm XP, weapon levels, and rewards. With careful setup — securing perks, upgrading weapons, and farming essence — you can reach high rounds quickly and efficiently. Whether you’re going for Dark Ops, leveling weapons, or simply farming XP, this guide ensures a smooth and rewarding experience.