Universal Tower Defense (June 2026) Gems & AFK Farming Guide

Gems are the essential currency for summoning new characters in Universal Tower Defense. This comprehensive guide reveals all 10 proven methods to get gems, including the most effective AFK farming strategy using macros that can generate thousands of gems while you’re away from the game. Learn exactly how to maximize your gem income with active codes, optimal farming locations, and expert strategies used by top players.

Quick Reference: Gem Acquisition Methods

Method	Gem Yield	Time Required	Difficulty
Story Mode Completion	50-200+ per stage	5-15 minutes	Easy
AFK Macro Farming	1000+ gems/hour	Setup time only	Medium
Code Redemption	200-4000 gems per code	2 minutes	Easy
Battlepass Rewards	1000-5000+ total	Weeks	Easy
Achievement Milestones	Up to 7000 total	Varies	Easy

All 10 Ways to Get Gems in Universal Tower Defense

Method 1: Story Mode Drops

Story Mode stages provide consistent gem rewards and are the foundation of gem farming. There are three main locations, each with six stages:

Ninja Forest (Stages 1-6): Complete any stage in Ninja Forest Story Mode to get gem rewards. This first location is themed around Naruto content and serves as the best farming area for beginners.

Marine Base (Stages 1-6): Complete any stage in Marine Base Story Mode to get gem rewards. The second location features One Piece-themed content and offers moderate gem rewards.

Hollowed Moon (Stages 1-6): Complete any stage in Hollowed Moon Story Mode to get gem rewards. The third location is based on Bleach content and provides the highest base gem rewards.

The amount of gems you get from Story Mode depends on the difficulty slider you set before starting the stage. Higher difficulty percentages give more gems when you complete the stage. For optimal farming, set your difficulty between 200-300% for the best balance of challenge and reward.

Method 2: Legend Stages Drops

Legend Stages are harder versions of Story Mode stages that provide significantly better rewards. Each of the three locations has three Legend Stages:

• Ninja Forest Legend Stages (Stages 1-3)
• Marine Base Legend Stages (Stages 1-3)
• Hollowed Moon Legend Stages (Stages 1-3)

Legend Stages require stronger teams to complete but provide better gem rewards than regular Story Mode stages. These are ideal for mid-to-late game players who have built up their unit roster.

Method 3: Virtual Realm Drops

Virtual Realm is a special game mode with challenging battles that reward gems generously:

• Hollowed Moon Virtual Realm (Stages 1-3)
• Marine Base Virtual Realm (Stages 1-3)

Virtual Realm stages are designed for experienced players and offer some of the highest gem rewards in the game. You’ll also earn Virtual Shop Currency here, which can be used to purchase exclusive items.

Method 4: Complete Challenges

The game includes various challenges that reward gems when you finish them. Check the challenges menu regularly to see what tasks are available. Challenges range from simple objectives to complex multi-stage tasks, with gem rewards scaling accordingly.

Featured Challenges and Half-Hourly Challenges are particularly valuable, as they often provide Trait Reroll Tokens along with gems. These challenges reset regularly, providing consistent opportunities for gem acquisition.

Method 5: Complete Quests

Daily and weekly quests give gem rewards when you finish them. These quests reset regularly, providing a steady source of gems over time. Log in daily to claim and complete quests for consistent gem income.

Daily quests typically offer smaller gem rewards (50-200 gems) but are easy to complete, while weekly quests provide larger payouts (300-1000+ gems) but require more time and effort.

Method 6: Unlock Achievements

The game has an achievement system that rewards gems when you reach milestones. Achievements might include things like summoning a certain number of units, completing specific stages, upgrading characters, or playing for a certain amount of time.

According to the official wiki, achievement rewards can provide up to 7,000 gems total across all milestones. Check your achievements regularly to claim gem rewards as you progress naturally through the game.

Method 7: Battlepass Rewards

The battlepass system includes gem rewards at various tiers. As you progress through the battlepass by playing the game and completing objectives, you unlock gem rewards along with other items.

The battlepass typically provides 1,000-5,000+ gems depending on how many tiers you complete. Both free and premium tracks offer gems, making this a reliable source of income for active players.

Method 8: Redeem Codes

The developers release codes periodically that give free gems and other rewards. These codes are often shared on the official Discord server and social media channels. As of December 2025, here are the active codes you can redeem:

Code	Rewards	Requirements
ThankYou100k	100 Trait Rerolls	Level 50+
HereyougoEA!	2,000 Gems, 20 Trait Rerolls, 5 Stat Locks	Early Access only
ThousandsOfCodes!	800 Gems, 15 Trait Rerolls	Level 5+
MaxedOut!	600 Gems, 10 Trait Rerolls	Level 5+
SixSeven!	67 Trait Rerolls	Level 15+
FixingBugs!	450 Gems, 25 Trait Rerolls	None
75kLikes!	400 Gems, 10 Trait Rerolls	None
NumberOne!	500 Gems, 15 Trait Rerolls	None
Universal!	450 Gems, 15 Trait Rerolls	None
Mainstream!	450 Gems, 15 Trait Rerolls	None
ThankYouUTD!	400 Gems, 5 Trait Rerolls	None
40kCCU!	4,000 Gems, 40 Trait Rerolls	None
THANKYOU!	400 Gems	None
RELEASE!	400 Gems	None
UNRIVALED!	200 Gems, 5 Trait Rerolls	None

How to Redeem Codes:

1. Launch Universal Tower Defense in Roblox
2. Select the ‘Codes’ button on the right side of the screen
3. Type a code into the text box and press the ‘Redeem’ button
4. Your rewards will be added to your account immediately

Method 9: Purchase from the Store

You can buy gems directly using Robux in the in-game store. This is the fastest way to get large amounts of gems but requires spending real money through Roblox’s premium currency system.

While purchasing gems isn’t necessary for progression, it can be useful for players who want to accelerate their unit collection or take advantage of limited-time banners featuring powerful units.

Method 10: Purchase from Virtual Shop

The Virtual Shop sometimes offers gem bundles for purchase using in-game currency or Robux. Check the Virtual Shop regularly for deals and special offers on gems.

The Virtual Shop rotates its inventory regularly, so even if you don’t see gem bundles available, check back every few days for new offers.

AFK Gems Farming Guide with Macros

The best way to farm gems efficiently is setting up a macro that plays through Act I Ninja Forest automatically while you’re AFK. This lets you collect gems without actively playing and can generate 1,000+ gems per hour once properly configured.

Best Farming Location and Setup

According to both the official wiki and extensive player testing, the optimal farming location is Story Mode: Ninja Forest – Act 1: Greedy Treasurer on Easy difficulty. Here’s why this location is ideal:

• Consistent Rewards: Later stages don’t reward more gems, so Act 1 is just as efficient as later stages
• Quick Completion: The stage can be completed quickly, maximizing runs per hour
• Low Risk: Easy difficulty ensures your macro won’t fail due to challenging waves
• Difficulty Scaling: Use the Difficulty Meter to multiply rewards (300% difficulty = 144 gems, 1000% difficulty = 228 gems)

For the best balance of challenge and reward, set your difficulty slider between 200-300% when starting out, then gradually increase it as your units grow stronger.

Step-by-Step Macro Setup Guide

Follow these steps carefully to set up your AFK gem farming macro:

Step 1: Prepare Your Stage

• Go to Story Mode and select Act I of Ninja Forest
• Set your difficulty slider to a percentage you can comfortably complete (start with 200-300%)
• Start the stage and play through all 15 waves normally
• Complete the stage but DO NOT claim the rewards yet
• Stop on the Victory screen showing your rewards

Step 2: Start Recording

• Open your macro program (InformalTask or TinyTask are recommended)
• Press Ctrl + R to begin recording
• IMPORTANT: Only perform the exact inputs you want recorded from this point forward

Step 3: Collect Rewards and Replay

• Click the screen 5-7 times to collect all rewards (click multiple times to ensure you get everything)
• Click the Replay button once on the Victory screen
• Click the Skip button once when the stage starts

Step 4: Place Your Units

• Place down your farming units in their positions
• Upgrade them as needed using the E key (don’t click upgrade with your mouse)
• Click the x1.5 speed button to make the stage run faster
• CRITICAL: Do not move your camera at all during this entire process

Step 5: Play Through the Stage

• Let the stage play normally with your units fighting
• Upgrade units using the E key when needed
• Do not touch your camera or make unnecessary mouse movements
• Wait until you complete all 15 waves and reach the Victory screen again

Step 6: Stop Recording and Loop

• When you reach the Victory screen, DO NOT claim rewards
• Press Ctrl + R to stop recording your macro
• Press Ctrl + L to start looping the playback
• The macro will now repeat your recorded inputs automatically

Common Macro Mistakes to Avoid

Based on extensive testing and community feedback, here are the most common mistakes that can break your macro:

1. Camera Movement: Never move your camera while recording. Camera movement will break the macro; only move your mouse within the visible screen.
2. Extra Inputs: Don’t press any extra keys or click outside the intended inputs. Every unnecessary action gets recorded and can cause desync.
3. Screen Resolution: Make sure your screen resolution and UI scale stay the same. Changing these will affect where your macro clicks.
4. Starting Point: Always start recording from the reward screen, not mid-stage. Starting from the wrong point will create an incomplete loop.
5. Claiming Rewards: Never claim rewards during recording. The macro should always end on the reward screen to create a proper loop.
6. Unit Placement Inconsistency: Place units in the exact same positions each time. Varying placement can cause the macro to fail.

Best Macro Tools for Universal Tower Defense

While you can experiment with different macro tools, the community consensus is that these two perform best:

• InformalTask: The most recommended option for Universal Tower Defense. It’s reliable, easy to use, and specifically optimized for gaming macros.
• TinyTask: A lightweight alternative that works well for simple farming macros. It’s less feature-rich but very stable.

Both tools are free to download and use. Avoid complex macro software unless you’re experienced with macro creation, as simpler tools are less likely to cause issues.

Will Macros Get You Banned?

According to the developers and community testing, macro usage is not condemned in Universal Tower Defense. However, the developers have stated they may make macro farming more difficult in future updates.

For now, macros are considered safe to use, but it’s always wise to use them responsibly and avoid running them 24/7. Most players run macros for a few hours at a time rather than continuously.

Best Team Composition for AFK Farming

While macro farming, you’ll want to use your strongest team composition. Unlike some games that require specific farming teams, Universal Tower Defense works best when you use your main squad for farming. This approach provides two benefits:

1. Gem Income: You’re generating gems consistently
2. Unit Progression: Your main units gain experience and level up while you farm

There’s no special team comp required for farming – simply use your best units that can reliably clear the stage at your chosen difficulty level. As your units grow stronger, you can increase the difficulty slider for better gem rewards.

Advanced Gem Farming Strategies

Optimizing Difficulty Settings

The difficulty slider is crucial for maximizing gem income. Here’s a breakdown of gem rewards at different difficulty levels:

• 100% difficulty: ~100 gems per completion
• 300% difficulty: ~144 gems per completion
• 500% difficulty: ~180 gems per completion
• 1000% difficulty: ~228 gems per completion

While higher difficulties give more gems, they also take longer to complete and risk failing. The sweet spot for most players is between 300-500% difficulty, offering a good balance of reward vs. time investment.

Multi-Account Farming

Some advanced players use multiple Roblox accounts to farm gems simultaneously. This strategy involves:

1. Setting up the same macro on multiple accounts
2. Running macros on different devices or using virtual machines
3. Transferring units or trading between accounts (if supported)

While this can significantly increase gem income, it requires more setup and management. It’s generally recommended for experienced players only.

Event Participation

Limited-time events often provide bonus gem rewards and special farming opportunities. During events, you might find:

• Double gem rewards weekends
• Special event stages with increased gem drops
• Event-specific codes with large gem payouts
• Achievement milestones with bonus gems

Always participate in active events to maximize your gem income during these periods.

Best Use of Gems

Summoning Strategy

Gems are primarily used for summoning new units, and how you spend them dramatically impacts your progression. Here’s the optimal strategy:

Save for S-tier and Mythic Units: The best units in the game (like Kenpachi, Kuriato, Ace, and Sasuke) should be your priority. These units can carry you through difficult content and provide the most value.

Avoid Common Units: Don’t waste gems on banner summons that feature mostly common units. The power difference between common and rare/epic units is significant.

Wait for Rate-Up Events: Summon during rate-up events that feature the units you want. These events increase your chances of pulling specific powerful units.

Check Banner Pity: Many banner systems have pity systems that guarantee high-rarity units after a certain number of summons. Track your progress toward these guarantees.

When to Spend vs. Save

Save Your Gems:

• When no good banners are available
• If you’re close to pity on a current banner
• When rate-up events for desired units are coming soon
• If you need gems for specific limited-time units

Spend Your Gems:

• During rate-up events for units you want
• When you’ve reached pity on a good banner
• For limited-time exclusive units that won’t return
• If you need specific units to progress through difficult content

Community Resources and Official Channels

Official Discord Server

Join the official Universal Tower Defense Discord server for:

• Real-time code announcements
• Developer updates and patch notes
• Community discussions and strategies
• Trading and unit valuation help
• Direct developer communication

The Discord server has over 200,000 members and is the most active community for Universal Tower Defense players.

Reddit Communities

• r/UniversalTowerDefense: The main subreddit for game discussions, strategy sharing, and news updates
• r/Roonby: Features official wiki links, Discord connections, and community resources

Official Wiki and Resources

• Universal Tower Defense Wiki: Comprehensive information on units, relics, and game mechanics
• Official Trello: Development roadmap and upcoming features
• YouTube Channel: Official trailers, update videos, and developer streams

Social Media Channels

Follow the official social media accounts for the latest news and codes:

• Twitter/X: Quick updates and code drops
• YouTube: Update videos and developer communications
• Roblox Group: Game updates and community events

Frequently Asked Questions

How many gems can I get per hour with AFK farming?

With proper macro setup, you can expect to earn 1,000-2,000+ gems per hour depending on your difficulty settings and macro efficiency. Higher difficulty settings yield more gems per run but take longer to complete.

What’s the best difficulty for AFK farming?

Start with 200-300% difficulty for reliable farming, then gradually increase to 500-1000% as your units grow stronger. The sweet spot for most players is 300-500% difficulty.

Are macros safe to use in Universal Tower Defense?

Yes, macros are currently safe to use. The developers don’t condemn macro usage but may make it harder in future updates. Use macros responsibly and avoid running them 24/7.

How often do new codes get released?

New codes are typically released during milestones (likes, members, updates) and events. Check the official Discord server regularly for the latest codes, as they’re usually announced there first.

What’s the fastest way to get gems without macros?

The fastest methods without macros include:

• Redeeming all active codes (can provide 10,000+ gems instantly)
• Completing daily and weekly quests
• Grinding Story Mode and Legend Stages
• Participating in limited-time events
• Progressing through the battlepass

How many gems do I need for a good unit collection?

A good starting collection requires 5,000-10,000 gems for initial summons. For a comprehensive collection including mythic units, you’ll want 20,000-50,000+ gems, depending on your luck and the banners available.

Can I get banned for using macros?

Currently, macro usage is not a bannable offense in Universal Tower Defense. However, this could change in future updates, so always check the official Discord for the latest policy updates.

What’s the best macro tool for beginners?

TinyTask is the best option for beginners due to its simplicity and reliability. InformalTask offers more features but has a slightly steeper learning curve.

How do I know if my macro is working correctly?

A working macro should:

• Complete the stage from start to finish without errors
• Return to the reward screen consistently
• Not move the camera or make unnecessary clicks
• Continue running for hours without desyncing

If your macro fails, check for camera movement, extra clicks, or screen resolution changes.

Should I spend gems on the battlepass?

If you play regularly, the premium battlepass is usually worth it for the gem rewards alone. You’ll typically earn back the gems you spent plus additional rewards and exclusive items.

Conclusion

Mastering gem acquisition in Universal Tower Defense is essential for building a powerful unit collection and progressing through challenging content. By combining all 10 gem acquisition methods – from Story Mode completion and code redemption to advanced AFK macro farming – you can generate thousands of gems consistently.

Remember to prioritize saving your gems for S-tier and Mythic units during rate-up events, and always check the official Discord server for the latest codes and updates. With the strategies outlined in this guide, you’ll be well on your way to becoming a top Universal Tower Defense player with an impressive roster of powerful units.

Start implementing these gem farming strategies today, and don’t forget to bookmark this guide for reference as new updates and methods become available. Happy farming, and may your summons be blessed with the rarest units!