Check the "Holiday Challenges", which often have daily goals with XP reward, on the event tab. Completing the Listkeeper Quest itself can grant you a large amount of XP as well as a Dark Ops calling cards. Each camo unlock gives you XP. You'll passively gain levels by following the guide, doing the Easter Egg steps, and using the Free-Fire trick. One operative pointed out that the Endurance mode ("Endgame") of cod bo7 bot lobby Zombies gives tons of XP. So even if you fail, it's not a waste.

 If you're looking for the best BO7 XP farm during Christmas, then look no further than akimbo shotguns plus the free fire glitch and double XP. This is a way to get to the top of the game while enjoying snow. Remember to enjoy the event as well - blasting without challenges is sometimes fun, but there's camo for you to earn!

  Known Issues & bo7 codes Final Tips

 Be aware of some bugs and issues that may arise in relation to this event.

 Low Drop Rate (Boss fight Frustration). As previously discussed, the boss fight's current drop mechanic has been tuned to a very low level. The fight is extremely difficult, especially when playing solo. We (and many players) believe that every three zombies would drop a gift instead of the sparse ones currently. Treyarch could adjust this with a patch. Expect a long grind in the interim. It may take several tries to get it right if you are trying it alone. Don't worry if you have to ask a friend to help. It's not easy to get the Infestation camo, which is a prized item.

 Field Upgrade Glitch: Occasionally, your equipment or upgrade does not activate when triggered. Power Keg Gobblegum/Consumables not popping. One operative was furious that his Power Keg did not deploy during the boss. This could be a glitch. Try not to repeatedly activate - just tap once and wait a few seconds. You should also ensure that you have the consumables equipped. Have a plan B in case something goes wrong (for instance, if you lose your invincibility gum, run away or use Aether Shroud).

 Auto-Revive/Quick Revive Issue: It seems that the self-revive in this mode (whether it's via a Quick Revive kit or tier) is buggy. This stupid augment does not work. It's broken again. We fixed it like two updates back and now we have to fix it again. Always keep a manual self-revive on hand in solo. Don't just rely on the perk. If you notice that a teammate is not getting up after their revive, go to them and manually revive.

 Elemental Pop & Random kills: As previously mentioned, Elemental Pop and certain Pack-a Punch effects can sabotage precision challenges. The PAP gun's Fireworks effect was described as "so OP that it made this challenge way harder" because it kept popping up and killing my entire army. You can use a weapon that has a negative effect, such as Brain Rot, Fireworks, or even zombies. You can either switch the gun out or repack it for a new effect before you start a challenge requiring controlled killing. Alternatively, you can simply choose to not use the gun that produces the effect in these challenges. Instead, rely on a different weapon.

 "Oscar", and other unseen elements: The transcripts state that "Oscar", is not included in the Listkeeper Challenge. Oscar could be a miniboss, or a quest in the normal version. Some normal quests are not available in the Listkeeper mode (the power was on as indicated). Don't worry if you don't see certain map events, like an intermediate boss called Oscar or other similar names. This is by design. If you find yourself facing an unexpected boss in the middle of a challenge, use your upgraded weapons to deal with it. It could be a result of playing during a special event.

 Co-Op sharing: Make sure everyone gets credit for unlocking camo. If one player completes an Easter Egg objective, then all players will receive the reward. (For example, Mutilate camo unlocks for everyone when the outdoor challenge is completed). Verify that the camo has been unlocked in your menu. You might have to do some feats individually if you don't get it. (Our intel says that the camo unlocks for the whole team). It's important to communicate and work together as a team - after all, it is the season of giving.

 If you can, use the Extraction option. Exfil may not be available during the final boss or challenge. It's best to finish the game or else you may lose your progress. You may have to restart the entire sequence if you die.

 Take pride in your accomplishments. You have completed an extreme Zombies Easter Egg and obtained several unique Christmas camos along the way. The Infestation camo is a symbol of your victory over the undead.

 The conclusion of the article is:

 You began with a fire and finished by putting out the worst threat of winter. You are holding a badge of honour, not just a camo. Our veteran in-game said: "I knew I would die... but if you have done it alone, let me now." This is a testament of how difficult this mission was. You did well, solo or in a group. Use the Infestation camo to show the world that you won the BO7 Zombies Christmas event.

 Mission accomplished! Now go out and kill some zombies with style. Enjoy the carnage and happy holidays!