How to Unlock Chapter 4 in Build ur Base (November 2025 Guide)
The Build ur Base Chapter 4 update introduces an exciting Circus-themed world packed with new enemies, powerful turrets, and exclusive rewards. To unlock this content, you must reach Wave 500 in the main game mode, which triggers a special cutscene and transports you to the carnival-themed dimension. This comprehensive guide will walk you through every step of unlocking Chapter 4, mastering the new challenges, and maximizing your rewards from both the permanent Circus content and the limited-time Subspace Event.
Key Information Summary
| Requirement | Details |
|---|---|
| Unlock Condition | Reach Wave 500 in main game mode |
| Release Date | October 13, 2025 |
| Theme | Circus/Halloween carnival |
| New Enemies | Clown mobs, Ghost enemies (invisible) |
| Limited Event | Subspace Event with exclusive rewards |
| Special Turret Needed | Circus Plasma Turret (for ghost enemies) |
Step 1: Reaching Wave 500 – The Gateway to Chapter 4
Before you can experience the Circus Chapter, you must overcome the significant challenge of surviving until Wave 500 in the main game mode. This is the mandatory requirement that unlocks access to Chapter 4, and it requires careful preparation and strategy.
Contents
Preparing Your Base for Wave 500
To successfully reach Wave 500, you’ll need to optimize your base defense with the following strategies:
Turret Upgrades:
- Focus on upgrading your existing turrets for maximum damage output
- Prioritize area damage turrets to handle large groups of enemies efficiently
- Ensure you have a mix of long-range and short-range coverage
Defensive Blocks:
- Use high-durability blocks like Mythic Blocks for critical defense points
- Create chokepoints where enemies are forced into concentrated paths
- Layer your defenses with multiple rows of blocks for added protection
Support Turrets:
- Place Minigun Turrets for rapid-fire support against regular enemies
- Use Laser Turrets for long-range coverage and piercing damage
- Consider support turrets that slow or stun enemies to control wave flow
Resource Management for Long Runs
Surviving to Wave 500 requires careful resource management:
- Economy Building: Invest in economy-generating structures early to ensure steady income
- Upgrade Priority: Focus on upgrading existing defenses rather than placing new ones initially
- Emergency Funds: Keep a reserve of resources for critical moments during boss waves
Step 2: Unlocking Chapter 4 – The Circus Transformation
Once you successfully complete Wave 500, the game rewards you with a special cutscene that introduces the Circus Chapter 4 event. This cutscene serves as the transition point, automatically loading you into the new carnival-themed world.
What Happens During the Transition?
- Cutscene Activation: The game automatically plays a storyline cutscene introducing the Circus theme
- World Transformation: Your game environment changes to a vibrant carnival setting with glowing tents and spooky decorations
- Event Activation: The Circus Chapter becomes permanently accessible to your account
First Impressions of the Circus World
The Chapter 4 world features:
- Visual Theme: Colorful carnival atmosphere with Halloween elements
- Sound Design: Spooky circus music and ambient sound effects
- Environmental Changes: Glowing tents, carnival props, and haunted circus backdrops
- New Enemy Spawns: Immediate appearance of clown-themed enemies
Step 3: Starting the Circus Chapter Event
After the transition, you’ll need to officially begin the Circus Chapter event:
Activating the Event
- Press “Fight”: Once in the carnival-themed world, press the “Fight” button to start the event
- Wave Progression: Begin facing waves of clown enemies that increase in strength with each wave
- Milestone System: Progress through wave milestones to unlock better rewards and new enemy types
Understanding the New Enemy Types
Clown Mobs:
- Basic enemies of the Circus Chapter
- Increase in strength and numbers as waves progress
- Vulnerable to most turret types but require strategic positioning
Ghost Enemies:
- Special Challenge: Invisible enemies that appear after certain wave milestones
- Unique Weakness: Can only be detected and damaged by event-exclusive turrets
- Mini-Boss Status: Act as mini-bosses during the Halloween update
- Enhanced Rewards: Drop more money and resources when defeated
Step 4: Mastering Chapter 4’s New Content
Chapter 4 introduces a wealth of new content that significantly expands the game’s strategic depth. Understanding these new elements is crucial for success in the Circus Chapter.
New Turrets in Chapter 4
The Circus update introduces five new turrets, each with unique capabilities:
| Turret Name | Rarity | Cost (Cash) | Special Ability |
|---|---|---|---|
| Circus Turret | Uncommon | 1M | Basic circus-themed defense |
| Circus Cannon | Rare | 5M | Medium area damage |
| Double Circus Cannon | Epic | 10M | High area damage, ideal for clustered groups |
| Circus Minigun | Legendary | 20M | Rapid-fire perfect for hordes |
| Circus Plasma Turret | Mythic | 40M | Detects and damages ghost enemies |
Turret Strategy Recommendations:
- Early Game: Start with Circus Turrets and Circus Cannons for cost-effective defense
- Mid Game: Upgrade to Double Circus Cannons for better area control
- Late Game: Invest in Circus Miniguns for crowd control and Circus Plasma Turrets for ghost enemies
- Essential Purchase: The Circus Plasma Turret is mandatory for dealing with ghost enemies effectively
New Blocks and Building Materials
Chapter 4 introduces three new block types with varying rarities and defensive capabilities:
| Block Name | Rarity | Cost (Cash) | Special Properties |
|---|---|---|---|
| Barrel Block | Rare | 2M | Standard defense with circus theme |
| Pumpkin Block | Epic | 5M | Halloween-themed, high durability |
| Circus Block | Mythic | 12M | Maximum durability and style rating |
Building Strategies:
- Pumpkin Blocks: Particularly useful for Halloween-themed builds due to their toughness and aesthetic appeal
- Circus Blocks: Provide the highest durability and best style rating for end-game bases
- Mixed Defense: Combine different block types for optimal defense and visual appeal
New Decorations and Customization Options
The Circus Chapter introduces numerous decoration options to customize your base:
Pumpkin Series (Epic – 5M each):
- Pumpkin Wedge
- Pumpkin Stair
- Pumpkin Window
- Pumpkin Laser Door
Circus Series (Mythic – 12-24M):
- Circus Stair (12M)
- Circus Wedge (12M)
- Circus Window (12M)
- Circus Laser Door (24M)
Special Features:
- Circus Laser Doors: Act as both barriers and traps, combining high durability with offensive capabilities
- Aesthetic Value: All decorations contribute to your base’s style rating
- Functional Benefits: Some decorations provide additional defensive capabilities
Step 5: The Subspace Event – Limited-Time Opportunities
Alongside the permanent Chapter 4 content, the update introduces a limited-time Subspace Event that offers exclusive rewards available only during this special period.
Accessing the Subspace Event
- Event Menu: Access the Subspace Event through the dedicated Event Menu
- Mission System: Complete specific missions to earn Subspace Keys
- Time-Limited: All rewards are limited stock and won’t be available after the event ends
Subspace Event Missions
The event features various mission types:
- Survival Challenges: Survive specific wave milestones
- Ghost Enemy Hunts: Defeat designated numbers of ghost enemies
- Building Tasks: Construct specific structures or base layouts
- Time Trials: Complete objectives within time limits
Subspace Keys and Reward System
Earning Subspace Keys:
- Complete event missions to earn keys
- Mission difficulty correlates with key rewards
- Check mission tracker regularly for new opportunities
Subspace Event Rewards:
| Reward Item | Description | Rarity |
|---|---|---|
| Subspace Crystal | Special crafting material for futuristic items | Unique |
| Subspace Plasma | High-energy weapon material for energy turrets | Unique |
| Subspace Railgun | Long-range energy weapon that pierces multiple enemies | Legendary |
| Subspace Sword | Plasma-infused melee weapon | Legendary |
| Subspace Block | Glowing defense block exclusive to the event | Mythic |
Reward Strategy:
- Priority Order: Focus on missions that reward keys early in the event
- Limited Stock: All rewards have limited availability – act quickly
- Completion Goal: Aim to unlock all five Subspace items before the event concludes
Advanced Strategies for Chapter 4 Success
Pro Tips for Conquering the Circus Chapter
1. Base Preparation Before Wave 500:
- Invest in economy upgrades early to ensure steady income
- Upgrade existing turrets rather than placing new ones initially
- Create multiple layers of defense using Mythic Blocks
- Test different turret combinations in earlier waves
2. Optimal Turret Placement:
- Coverage Strategy: Place turrets to cover all approach angles
- Support Turrets: Use Miniguns and Laser Turrets for versatile coverage
- Choke Points: Concentrate firepower where enemies converge
- Elevation Advantage: Use higher ground for better turret range
3. Ghost Enemy Management:
- Early Investment: Purchase Circus Plasma Turrets as soon as possible
- Strategic Placement: Position plasma turrets to cover high-traffic areas
- Support Setup: Use regular turrets to handle visible enemies while plasma turrets focus on ghosts
- Resource Allocation: Dedicate significant resources to anti-ghost defenses
4. Wave Progression Strategy:
- Milestone Goals: Aim for specific wave milestones to unlock better rewards
- Resource Management: Balance between immediate defense needs and long-term upgrades
- Adaptability: Adjust your strategy based on enemy composition changes
- Persistence: The further you survive, the better your rewards become
5. Subspace Event Optimization:
- Mission Prioritization: Focus on high-reward missions first
- Time Management: Complete missions early before stock runs out
- Resource Preparation: Ensure adequate resources for mission requirements
- Regular Check-ins: Monitor the event menu for new mission opportunities
Common Mistakes to Avoid
1. Underestimating Wave 500:
- Don’t rush into Wave 500 without proper preparation
- Ensure your base can handle the difficulty spike
- Have emergency resources available for critical moments
2. Neglecting Ghost Enemy Preparation:
- Don’t wait until ghosts appear to purchase Circus Plasma Turrets
- Plan your anti-ghost strategy in advance
- Allocate sufficient resources for ghost defense
3. Ignoring the Subspace Event:
- Don’t postpone Subspace missions – rewards are limited
- Prioritize event missions alongside regular gameplay
- Monitor event timers and stock availability
4. Poor Resource Management:
- Avoid spending all resources on immediate needs
- Maintain reserves for emergencies and upgrades
- Balance between turret purchases and block upgrades
Community Resources and Official Channels
Official Resources
Build ur Base on Roblox:
- Game Page: Roblox Build ur Base Official Page
- Developer: High Quality Games!
- Last Updated: October 13, 2025
- Community Size: 5,184,000+ favorites, 115.0M+ visits
Official Discord Server:
- Server Link: Builds ur Base Discord
- Features: Automated stock notifier, free giveaways, community discussions
- Members: 1,607+ members, 140+ online
- Benefits: Real-time updates, trading opportunities, community support
Community Resources
Reddit Communities:
- While there isn’t a dedicated Build ur Base subreddit, Roblox gaming communities often discuss popular games
- Check r/roblox and r/RobloxGames for community discussions
YouTube Content Creators:
- RussoPlays: Covers new updates and turret showcases
- Dafoomez: Provides strategy guides and base building tips
- Dqrkz: Specializes in optimal base layouts and defense strategies
Fan Wikis and Guides:
- Roblox Fandom Wiki: Contains basic game information and updates
- Community Guides: Various content creators create detailed video and written guides
Frequently Asked Questions (FAQ)
Q: What exactly is required to unlock Chapter 4 in Build ur Base?
A: The only requirement to unlock Chapter 4 is reaching and completing Wave 500 in the main game mode. Once you achieve this milestone, a cutscene will automatically play, transporting you to the Circus-themed world of Chapter 4.
Q: When was the Build ur Base Chapter 4 update released?
A: The Chapter 4 “Circus” update was officially released on October 13, 2025. This release date is confirmed by both the official Roblox game page and multiple gaming news sources.
Q: Can I access Chapter 4 content without reaching Wave 500?
A: No, reaching Wave 500 is a mandatory requirement. There are no shortcuts or alternative methods to unlock Chapter 4. All players must complete this challenge to access the Circus-themed content.
Q: What are Ghost Enemies and how do I defeat them?
A: Ghost Enemies are invisible enemies that appear after certain wave milestones in Chapter 4. They can only be detected and damaged by specific event-exclusive turrets, primarily the Circus Plasma Turret. These enemies serve as mini-bosses and drop enhanced rewards when defeated.
Q: How long will the Subspace Event be available?
A: The Subspace Event is a limited-time event with limited stock rewards. While the exact end date isn’t specified, all rewards are limited stock, meaning once they’re claimed, they won’t be available again until a potential future rerun of the event.
Q: What are the best turrets to use in Chapter 4?
A: The best turret combination depends on your progression, but generally:
- Early Chapter: Circus Turrets and Circus Cannons for cost-effective defense
- Mid Chapter: Double Circus Cannons for area damage
- Late Chapter: Circus Miniguns for crowd control and Circus Plasma Turrets (essential) for ghost enemies
Q: Can I still play Chapter 4 after the Subspace Event ends?
A: Yes, the Chapter 4 map and its base items remain permanently accessible after the event. However, the Subspace missions and certain Mythic rewards become unavailable once the event concludes.
Q: How do I get Subspace Keys?
A: You earn Subspace Keys by completing missions within the limited-time Subspace Event, accessible through the Event Menu. Each completed mission rewards keys that can be used to unlock exclusive event items.
Q: What can I get from Circus Crates?
A: Circus Crates contain exclusive cosmetic items and gear with rarities ranging from Rare to Mythic. The three crate types are:
- Circus Crate (Rare) – 2.5M
- Circus Tent Crate (Legendary) – 5M
- Shadow Crate (Mythic) – 10M
Q: Are the new Chapter 4 items worth the investment?
A: Yes, especially the Circus Plasma Turret (essential for ghost enemies) and Circus Blocks (highest durability). The Subspace Event items are particularly valuable due to their limited availability and unique properties.
Conclusion: Your Path to Chapter 4 Mastery
The Build ur Base Chapter 4 update represents one of the most significant content additions to the game, offering a fresh challenge with its Circus/Halloween theme and introducing innovative gameplay mechanics. By following this comprehensive guide, you now have all the knowledge needed to:
- Successfully reach Wave 500 and unlock Chapter 4
- Master the new enemy types, including the challenging ghost enemies
- Optimize your base defense with new turrets, blocks, and decorations
- Maximize your rewards from both permanent content and the limited-time Subspace Event
- Avoid common pitfalls that many players encounter when tackling Chapter 4
Remember that preparation is key – invest time in strengthening your base before attempting Wave 500, prioritize the essential Circus Plasma Turret for ghost enemies, and don’t neglect the time-sensitive Subspace Event. The Circus Chapter offers some of the most powerful and exclusive items in the game, making the challenge well worth the effort.
Bookmark this guide and check back regularly for updates as the meta evolves and new strategies emerge. Join the official Discord community to stay connected with fellow players and get real-time updates about the game’s development. Your journey to becoming a Chapter 4 master starts now – build your base, prepare your defenses, and dive into the carnival of chaos that awaits in Build ur Base’s most exciting chapter yet!