Here’s what’s new in Merge Your Army Update 4: new codes, new defenders, and loads of content and changes. Update 4 was released on January 24th, 2026, and I have shared the log here.
Merge Your Army Update 4
Merge Your Army Update 4 delivers a major content drop with new defenders, a full Bloodmoon event system, new bosses, diamond zombie mechanics, rebirth expansions, a powerful new bundle, new turrets, abilities, and multiple quality-of-life upgrades. The update significantly expands late-game progression, farming systems, and event-based rewards while adding fresh combat content and long-term progression features.
Merge Your Army — Update 4 Log
New Defenders
- Diver
- Swimmer
- Gregor
- Toraki
Bloodmoon Event
- Every 30 minutes, the moon turns bloody and the sky turns red
- For 5 minutes, Bloodmoon coins have an increased drop rate
- Bloodmoon coins
- Obtained randomly by killing zombies
- Drop rate increases during the Bloodmoon event
- Bloodmoon Spin
- Costs 10 Bloodmoon coins
- Rewards include Bloody Tesla, Bloody Sword, and Bloody Crate
- Bloody Blade
- Obtainable from the Bloodmoon Spin
- Currently the strongest weapon in the game
Bloody Ability Crate
- Blood Rain
- Summons a blood storm that rains on enemies and deals passive damage
- Spider Web
- A massive web falls from the sky and stuns enemies for 3 seconds
- Moon Drop
- A Bloodmoon falls from the sky and deals massive damage to enemies
New Turret
- Bloody Tesla
- An improved Tesla turret
- Only obtainable through the Bloodmoon Spin
New Bosses
- New bosses added to wave 225 and wave 250
- Bosses introduced: Ninja and Nerd
Diamond Zombies
- Zombies now have a chance to spawn in Diamond form
- Killing Diamond Zombies rewards diamonds
- Added to allow diamond farming after reaching max rebirth
New Rebirth Levels
- Rebirth 15 added
- Rebirth 16 added
- Rebirth 17 added
Vampire Bundle (799 Robux)
- Vampire Defender
- 5,400 DPS
- Vampire Blade
Bug Fixes and QoL Changes
- Added option to sell turrets
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- Refunds 50% of gems spent on upgrades
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- Now displays which defenders and turrets deal splash damage
- Rebirths now increase fire rate
- +3% fire rate per rebirth
New Codes
Merge Your Army Update 4 added the following two new codes:
- UPDATE4
- 5MVISITS
Rewards include a small damage potion and 5 gems. For older codes, head to my Merge Your Army Codes article.
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