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Undead Mayhem promo image
Image via Undead Dev.

Undead Mayhem Codes

Fend off waves of zombies with these Undead Mayhem codes!

Hordes of zombies are attacking you and your teammates—are you strong enough to kill them and survive? Launch Undead Mayhem and find out! While you’ll earn Zombux for each kill, you will need a lot of money to upgrade your weapons.

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Redeeming Undead Mayhem codes is the best way to get a lot of Zombux quickly so you can get better weapons and ammo refills hassle-free. You will also obtain XP Buffs and other useful freebies that will help you face all those vile zombies without any issues. And if you’re in need of extra help in similar Roblox games, read our Zombie Hunters Codes article to get some cool freebies there as well.

All Undead Mayhem Codes List

Undead Mayhem Codes (Working)

  • update3: 10 Minute XP Buff (New)
  • update2: 10 Minute XP Buff
  • 9000LIKES: 250 Zombux
  • luckytuesday: 30 min XP Buff
  • timetofarm: 30 min XP Buff
  • casualxpbuff: 20 min XP Buff
  • 2000LIKES: x250 Zombux
  • HAPPYUPDATE1: 10 Minute XP Buff
  • SUNDAYGRIND: 30 Minute XP Buff and x250 Zombux

Undead Mayhem Codes (Expired)

  • 1250LIKES
  • 500LIKES

Related: Bad Business Codes

How to Redeem Codes in Undead Mayhem

To redeem Undead Mayhem codes easily, follow the steps below:

How to redeem codes in Undead Mayhem
Screenshot by GameSkinny
  1. Open Undead Mayhem on Roblox.
  2. Click the weapons icon on the left side of your screen.
  3. Input your code into the Enter code here text box on the right side of your screen.
  4. Click on Redeem to claim the goodies.

How to Get More Undead Mayhem Codes

By saving this article, you will always have access to all the active Undead Mayhem codes. We update our guide as soon as there are new codes, so check this page often to stay in the loop. If you prefer official sources and don’t mind investing a few hours looking for codes, you can join the official Undead Mayhem Discord server or follow the developer’s X account (@inventionrunner).

Why Are My Undead Mayhem Codes Not Working?

Typos are the main reason why players have issues when redeeming Undead Mayhem codes, so double-check your spelling before you press the Redeem button. If you copy and paste the codes from our list into the game, you won’t have to worry about spelling errors. If you still see the Invalid code message, the code in question is no longer redeemable. This happens to all codes eventually, so redeem them as soon as possible.

Other Ways to Get Free Rewards in Undead Mayhem

Redeeming Undead Mayhem codes is the best way to get valuable freebies. Another option to get rewards, such as buffs and weapons, is to spin the reward wheel every day (located on the left side of the screen). If you’d like to participate in giveaways and special events, join the above-linked Discord server.

What Is Undead Mayhem?

Undead Mayhem is a survival experience on Roblox where your main goal is to protect an abandoned hospital from nasty zombies trying to kill you. Join three other players and defeat waves of the undead (with each wave being more challenging than the previous one). You will obtain Zombux and XP for each kill. Use the collected resources to get more ammo and upgrade your weapons to be more efficient and face more challenging zombies more easily.

Our Roblox Codes section offers codes for many popular titles, so don’t miss an opportunity to get freebies before the codes expire!

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Image of Kristina Timotic
Kristina Timotic
Kristina Timotic is a Codes Staff Writer who prides herself on her research abilities. No code will remain unredeemed on her watch! When she's not forced to watch Masha and the Bear with her toddler, she enjoys beating her husband in Halo, playing Asterix and Obelix XXL on Nintendo Switch, and watching makeup tutorials on YouTube.