Knock Knock: Room Defense in IOS

Enjoy 404 lucky draws!

Walkthrough, Guilds, Tips on this special game

The Game

Available on: iPhone, iPad, iPod

Version 10000.0.66Mon Aug 31 2026

1. Version content upgrade and optimization

2. Known issues fixed



Requires iOS 15 or later. Compatible with iPhone, iPad, and iPod touch.

[Special Rewards] 404 Draws, Character Skin, Random Orange Hero, and Limited Decor!

When your city becomes the hunting ground for ghosts and monsters... "Knock, knock." Someone's knocking on your door...

"Shh, don't make a sound, and don't open the door."

Creatures from age-old tales and urban legends are trying to break into your house. Your job? Close the door and defend it with your heroes as your heart pounds with excitement and no fear.

Schools, hospitals, hotels, streets, and office buildings—the most mundane locations become thrill-filled tower defense challenges. Get ready for stunning visuals and smooth controls in 5-minute matches!

[Five Main Features to Define New Horror Tower Defense]​

※ Choose your room, close the door, relax, and level up!

Ghosts are here and there's no escape? Well—kick back and relax!

Choose your room, close the door, and kick back to level up in dreams and summon heroes to build your defense line! It's up to you to defend the ghosts and monsters at night!

※ Strategize to turn the table in the mind game​​

No risking your life, but more than hide-and-seek! Everything from the beds, doors, to your heroes can be leveled up, because the whole room is your defense line. Build the right lineup and plan wisely for every challenge and event. Every win is guaranteed to be rewarding.

※ Immersive visual experience

Dive into the immersive eerie world with a distinct gothic chibi-style aesthetic. Is it blood or wine in the cup held by the vampire? Why is the killer with a chainsaw wearing a cute bunny mask? A hundred unique and stylized heroes and ghosts with cute horror elements.

※ Wide selections of avatars and instances

Turn into a ghost hunter and explore all kinds of haunted locations—from a train with lingering phantoms, a dormitory echoing with singing at midnight, to a mysterious underground cave. Now, pick your avatar from a wide collection and brace yourself for the ghost chase.

※ Fast and exciting tower defense battle

Grab your phone and start a 5-minute no-stress match anytime, anywhere! Quality tower defense fun made simple and fast.


In-Game Events

Official launch today!
PREMIERE
Official launch today!
Idle horror tower defense! Survive the ghost tide!

Lie down to get stronger! Enjoy 5-min thrill battles. Huge launch rewards & events are live. Join the secret horror war!

Starts: 8/26/2026Ends: 9/9/2026

Ratings & Reviews

5 out of 5 with 10 Counts
Age Rating 13+

Screenshots

Knock Knock: Room Defense screenshot 1Knock Knock: Room Defense screenshot 2Knock Knock: Room Defense screenshot 3Knock Knock: Room Defense screenshot 4Knock Knock: Room Defense screenshot 5Knock Knock: Room Defense screenshot 6Knock Knock: Room Defense screenshot 7Knock Knock: Room Defense screenshot 8Knock Knock: Room Defense screenshot 9Knock Knock: Room Defense screenshot 10Knock Knock: Room Defense screenshot 11Knock Knock: Room Defense screenshot 12Knock Knock: Room Defense screenshot 13Knock Knock: Room Defense screenshot 14

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