How to Get Into Chapter 4 in Build ur Base

The Build ur Base Chapter 4 update introduces a brand-new Circus theme, complete with glowing tents, spooky enemies, and powerful new turrets and crates. However, many players are wondering how to actually unlock and access Chapter 4. If you’ve been stuck in earlier chapters or unsure how to trigger the event, this guide explains everything you need to do to enter Chapter 4 and start the new Carnival adventure.

Build ur Base Chapter 4 Guide – Step by Step!

Step 1: Reach Wave 500 in Main Mode

Before you can unlock Chapter 4, you must first reach Wave 500 in the main play mode of Build ur Base. This is the key requirement for triggering the next storyline cutscene and unlocking access to the new chapter.

If you haven’t hit Wave 500 yet, focus on:

• Upgrading your turrets for better firepower.
• Using defensive blocks with high durability, such as Mythic Blocks.
• Placing support turrets like the Minigun or Laser Turret to handle boss waves faster.

Once you clear Wave 500 successfully, the game will automatically play a cutscene that introduces the Circus Chapter 4 event.

Step 2: Load Into the Circus Map

After the cutscene, your game will transition into the new Carnival-themed world. This map is filled with festive decorations, creepy circus tents, and new enemy types like clown mobs and ghost enemies. You’ll notice that your surroundings change completely — the stage lights, tents, and spooky sound effects all signal that you’ve entered Chapter 4: Circus.

Step 3: Start the Circus Chapter Event

Once inside the map, press “Fight” to begin the event. You’ll start facing waves of clown enemies, which become stronger the longer you survive. Later on, Ghost Enemies will appear — these invisible foes can only be detected using event-exclusive turrets, such as the new Circus Plasma Turret.

As you progress through waves, you’ll earn Circus Crates, event currency, and other themed rewards. Each milestone wave increases your payout, so the deeper you go, the better your loot will be.

Step 4: Explore New Features in Chapter 4

Once you’ve entered Chapter 4, several new gameplay elements become available, including:

• Circus Crates (Rare to Mythic tiers) containing special weapons and event gear.
• New Turrets, such as the Circus Minigun, Double Circus Cannon, and Circus Plasma Turret.
• Exclusive Event Blocks and Decorations for building your carnival-themed base.
• A Subspace Event, a limited-time mode that offers rare Subspace weapons and crafting materials.

These features make Chapter 4 one of the most content-rich updates so far.

Step 5: Participate in the Subspace Event (Optional but Recommended)

After entering Chapter 4, you’ll gain access to the Subspace Event through the Event Menu. Completing missions here rewards you with Subspace Keys, which can be used to unlock exclusive event items such as:

• Subspace Railgun (long-range weapon)
• Subspace Sword (plasma-infused melee weapon)
• Subspace Block (rare glowing defense block)

Make sure to complete as many missions as possible before the event ends, as these items are only available for a limited time.

Unlocking Chapter 4 in Build ur Base requires dedication, but the reward is worth it. Once you reach Wave 500, the game opens up a brand-new world full of powerful turrets, collectible crates, and limited-time Subspace rewards. Prepare your defenses, stock up on resources, and dive into the Carnival of Chaos that defines the Circus Chapter 4 update.