SpongeBob Tower Defense Rock Bottom guide

With Update 17, SpongeBob Tower Defense saw the arrival of a new story mode World called Rock Bottom. Added to the game on April 25, 2025, this map includes 10 stages and two Infinite modes for you to clear across two Acts. Since this is a story mode World, the map will be available at all times, so you don’t have to worry about expiration dates.

Here’s everything you need to know about Rock Bottom in SpongeBob Tower Defense.

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Breaking down Rock Bottom in SpongeBob Tower Defense

Overview

Story stage access point (Image via Roblox)

Rock Bottom is the newest story stage, and as is the norm for such maps, you must clear every preceding World to unlock it. Once you clear all stages in Sandy’s Treedome, which is the World directly preceding this one, you will gain access to Rock Bottom.

The premise of this World is that SpongeBob is trapped at the far end of the Rock Bottom map, and you must protect him. Each stage includes 15 waves or more, all of which must be repelled to prevent any harm befalling the titular character.

The map layout for this World is lengthy and winding, which makes each battle an endurance test. It also leaves some room for error, allowing you to reposition your units if some enemies happen to slip past your defenses. Defeat all enemy waves to earn rewards corresponding to the chosen difficulty.

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Stages and difficulty

Official cover art for the game (Image via Roblox)

The 10 stages in Rock Bottom are split into two Acts: Act 1 and Act 2. Each Act features five stages and an Infinite mode stage for additional replay value. The five stages are standard fare, featuring a limited number of enemy waves. In contrast, the Infinite mode lets you put your units to the test against a never-ending horde of foes.

Rock Bottom offers the best rewards out of any story stage so far, which is fitting since it is also the most challenging of them all. It comes with the standard set of three difficulties: Normal, Hard, and Nightmare. Normal and Hard can be accessed from the get-go, while Nightmare must be unlocked by beating Hard mode once.

The prizes you receive from these variations increase based on the chosen difficulty. While the reward variety doesn’t change between difficulty modes, they do increase in quantity. For instance, you receive 70 Gems by clearing a stage on Normal mode, while the same stage rewards you with 100 Gems on Hard mode.

You can also acquire the Glove Candy food item as a reward from this World. Each Glove Candy grants 900 XP to the unit of your choice and is only available from Rock Bottom as of now. This makes the stages in this World worth replaying, as you can quickly max out your units with plenty of Glove Candies in your inventory.

Lastly, a limited-time reward is tied to the Nightmare mode of this World: the Glove Balloon mount. Available until 11:59 pm on April 28, 2025, this mount requires you to complete all 10 Nightmare mode stages in Rock Bottom. Once it has expired, the vehicle will no longer be available through regular means.

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FAQs

How many stages does Rock Bottom include in SpongeBob Tower Defense?

Rock Bottom features 10 regular stages and two Infinite mode levels.

What are the different difficulty options in the Rock Bottom World of SpongeBob Tower Defense?

Rock Bottom includes three difficulty options: Normal, Hard, and Nightmare.

How to get Glove Candy in SpongeBob Tower Defense

Glove Candy has a chance to drop upon clearing stages in the Rock Bottom World.