Universal Tower Defense Z Update 4.0 Guide: Night Raid Mode, New Codes, and More!

Universal Tower Defense Z Update 4.0 introduces one of the biggest quality-of-life patches yet, adding a brand-new Night Raid Extraction mode alongside major balance adjustments, interface improvements, and several convenient gameplay features. Whether you’re farming powerful units, optimizing your team, or simply looking for a smoother experience, this update brings plenty of changes worth knowing.

Besides introducing Night Raid, the developers have also rebalanced numerous popular units, added an Inbox system for rewards and code redemption, improved lobby navigation, and implemented several community-requested features. Here’s everything included in Universal Tower Defense Z Update 4.0.

Are There New Codes?

Instead of releasing new redeemable codes with Update 4.0, the developers have switched to a login reward system. Players simply need to log into Universal Tower Defense Z during the update period to receive special rewards without manually entering promotional codes.

This change makes it easier for everyone to claim update bonuses, as rewards are distributed automatically through the game’s new Inbox feature. Be sure to log in during the event period so you don’t miss any limited-time rewards.

Night Raid Mode Arrives with Better Rewards and Tougher Battles

The highlight of Update 4.0 is the introduction of Night Raid, a special version of the Extraction game mode that appears every hour. Rather than replacing the standard Extraction, Night Raid alternates with the normal version, giving players regular opportunities to challenge a more difficult experience for improved rewards.

Compared to the regular Extraction mode, Night Raid offers:

• Increased chances of valuable item drops
• Stronger enemy waves
• Shorter extraction timers
• More challenging overall gameplay

Players looking to maximize farming efficiency will likely prioritize Night Raid whenever it becomes available. However, the stronger enemies mean well-built teams and upgraded units are more important than ever.

Complete Unit Balance Changes

Update 4.0 also delivers numerous balance adjustments. While only two units received nerfs, a long list of characters benefited from significant buffs that improve their overall usefulness.

Nerfed Units

Yhwach

Yhwach’s Blue Burn damage-over-time effects have been toned down to prevent excessive scaling.

Changes include:

• Blue Burn damage reduced to 10%
• Maximum Blue Burn damage-over-time capped at 300%

These changes primarily target extended fights where Blue Burn could previously stack into extremely high damage.

Sinbad

Sinbad wasn’t directly weakened through numbers, but a long-standing damage bug has finally been fixed. As a result, players may notice lower effective damage if they previously benefited from the unintended behavior.

Buffed Units

Many fan-favorite units received meaningful improvements across multiple upgrade paths.

Merciless God

Merciless God now deals more damage across every upgrade path, making the unit a stronger overall DPS option regardless of build choice.

Joyful Captain

Joyful Captain received several improvements.

General changes include:

• Increased damage across all upgrade paths

Snakeman Path:

• Follow-up requirement reduced to only one hit
• Single-target follow-up damage increased to 250%

Boundman Path:

• Now attacks ground enemies only

Although the Boundman path lost aerial targeting, the Snakeman improvements significantly increase its single-target potential.

The Phantom Trickster

The Phantom Trickster becomes more affordable while gaining stronger offensive power.

Changes include:

• Higher overall damage
• Lower placement cost
• Increased cost for the final two upgrades

This makes early deployment easier without greatly affecting late-game investment.

Only Hope of Humanity

Hope generation has become much more consistent.

Changes include:

• Normal enemies now contribute to the Hope Bar
• Every five enemy eliminations grant 1% Hope

This allows players to charge Hope even without relying solely on elite enemies.

Ambush

Ambush now deals True Damage during All Out Attack.

This improvement allows the attack to bypass certain defensive mechanics, making it considerably stronger against durable enemies.

Cranium

Cranium received multiple upgrades that improve both affordability and damage output.

General changes:

• Lower total deployment cost

Electrified Pipe:

• Electrified damage-over-time increased to 100%
• Every Electrified application adds +2% Hyper Armor Damage
• Bonus caps at +100%

The Captain Arrives:

• Phantom Companion now appears at Upgrade 3

Anne

Anne is now cheaper to build while also receiving stronger companion mechanics.

Changes include:

• Reduced total cost

Dancer of Passion:

• Phantom Companion now spawns immediately upon placement

Agilao Amplification:

• Burn damage-over-time increased to 100%

Feline

Feline also becomes easier to deploy.

Changes include:

• Lower overall cost

Rescue Cat:

• Follow-up attack damage increased to 150%

Small Companion:

• Phantom Companion now appears immediately after placement

Ice Queen

Ice Queen’s crowd-control abilities have become much more reliable.

Flash Freeze:

• Confusion now activates every time

Cold as Ice:

• Freeze duration increased to six seconds

These adjustments significantly improve Ice Queen’s ability to lock down enemy waves.

Drill Hero

Drill Hero received major offensive improvements.

Changes include:

• 50% Spiral Core now grants +100% Mech damage
• Nuke damage increased by 400%
• Manual attack version damage increased by 100%

These buffs dramatically increase both burst damage and sustained output.

Neko Captain

Neko Captain now offers stronger utility and scaling.

General changes:

• Reduced deployment cost

Lightning Feline:

• Transformation now stuns enemies for four seconds
• Chain Lightning damage increased to 75%

Hand on Paw:

• Gains 25% additional damage for every allied placement within range

The Fatality

The Fatality becomes a stronger damage-over-time specialist.

The Deathdealing:

• Poison damage increased to 16% per tick
• Maximum poison reaches 80%

Gift Bereich:

• Domain duration increased to 45 seconds
• Allied damage-over-time effects increased by 100% while inside the domain

Flame Captain

Hell’s South now remains active longer.

Changes include:

• Domain duration increased to 60 seconds

Longer uptime allows Flame Captain to maintain powerful buffs for a greater portion of each battle.

New Lobby HUD and User Interface

Update 4.0 refreshes the overall lobby experience with an improved HUD and cleaner interface. While the gameplay remains familiar, navigating menus and accessing important features is now more convenient.

The redesigned interface also serves as the foundation for several newly added systems introduced in this patch.

Inbox System Makes Rewards Easier to Claim

A brand-new Inbox feature has been added to the game.

Players can now:

• Claim update rewards
• Receive event rewards
• Collect developer gifts
• Access special distributions directly from one location

In addition, code redemption has been relocated to the lower-left section of the Inbox, making promotional codes much easier to manage.

Auto Sell for Mythics and Shiny Units

Inventory management becomes much simpler thanks to the new Auto Sell option.

Players can automatically sell:

• Mythic units
• Shiny units

This feature is especially useful during long farming sessions where inventories can quickly fill with duplicate rewards.

Etherealization Shards Added to the Banner

Banner summons now have an additional incentive.

Players can obtain Etherealization Shards directly through the Banner system, providing another progression method while pulling for new units.

Vote Kick System Added

Multiplayer matches now include a Vote Kick feature.

Requirements:

• At least three players must be present in the match

This system helps parties remove inactive or disruptive players during cooperative gameplay.

Free Camera Keybind Updated

The developers have also adjusted the default free camera shortcut.

Old keybind:

• Shift + C

New keybind:

• Shift + P

Players who frequently use free camera mode should update their controls accordingly.

Universal Tower Defense Z Update 4.0 focuses heavily on improving both gameplay and quality of life. Night Raid introduces a rewarding challenge for experienced players, while the extensive balance changes breathe new life into many popular units. Combined with the redesigned lobby, Inbox system, Auto Sell options, Vote Kick functionality, and additional Banner rewards, this patch makes the overall experience more streamlined and enjoyable. Whether you’re returning after a break or actively farming endgame content, Update 4.0 offers plenty of reasons to jump back in and explore everything the latest patch has to offer.