Spongebob Tower Defense Update 15 Guide New Units, Secret Unlocks, Codes & More!

Update 15 has officially dropped in Spongebob Tower Defense, and it comes packed with exclusive content, powerful new units, and game-changing quality-of-life improvements. Whether you’re grinding to stay on top or just curious about what’s new, here’s everything you need to know in this latest patch.

All New Things Coming to Spongebob Tower Defense Update 15

• Check out how each new unit in the Tier List Spongebob Tower Defense

New Secret Unit: Alaskan Bull Worm

One of the biggest highlights of Update 15 is the addition of the Exclusive Secret Unit – Alaskan Bull Worm, now available through the Magic Conch Summon. This unit isn’t just for show; it’s built to wreak havoc on enemy lines.

Alaskan Bull Worm Stats & Abilities:

• Attack Type: Piercing (Hits multiple enemies in a line)

• Effect: Applies Frostbite – a combo of Damage over Time (DoT) and slowing effect

• Summon Source: Magic Conch only (Secret-tier pull)

This makes it a top-tier addition for players who need both crowd control and sustained DPS.

More Exclusive Units in Magic Conch

Alongside the Alaskan Bull Worm, two more exclusive units have been added to the Conch Summon pool:

• (Mythic) Tattletale Strangler – Likely a high-damage, limited-range unit based on its rarity.

• (Epic) Barg’N-Mart – Possibly a support or economy-focused unit, though further in-game testing will confirm.

Both are available in Magic Conch pulls, so make sure to save your resources or luck out during events.

Secret AFK Unit: Unlock “???”

A unique reward awaits players who are truly dedicated (or just extremely idle). A new Secret Unit—currently named “???”—can now be unlocked through the following requirements:

• Stay AFK for 1,000+ Hours

• Complete All Lazy Lagoon Achievements

While the unit’s identity and abilities are still hidden, the challenge alone makes it a sought-after goal for long-time players.

Quality of Life Improvements

Update 15 brings some much-needed tweaks that improve overall gameplay flow and faction experience:

• Global Announcements for 2x Entire Faction Boost purchases – makes it easier to coordinate with teammates.

• Treasure Chests can now be opened anywhere within Faction Grounds, saving you from running back to base.

• Unique Background Music has been added to each Faction Clubhouse, making each one feel more immersive and distinct.

Spongebob Tower Defense Update 15 Codes – Are There Any?

• Update15Yay
• Wormfoodyum

Also check out our previous Spongebob Tower Defense Codes for more redeemable rewards!

Update 15 delivers solid content for Spongebob Tower Defense fans. From powerful units like the Alaskan Bull Worm to long-term grind incentives with the AFK secret, there’s something for every kind of player. Plus, with helpful QoL updates and a generous new code, this patch adds both depth and accessibility.