About Game - Zombie Knocks Door 3D
Zombie Knocks Door 3D is a 3D dorm survival-defense game you can play free in the browser. The loop is the same as Haunted Dorm, seen from above in 3D: you claim an empty bedroom, stay in bed for coins, Fortify the door, and build Light Crossbows before a zombie knocks through. Classmate portraits let you check who is still safe. The hospital hub, iron doors, and dim corridors are why the atmosphere reads denser than the 2D dorm.
How to Play - Zombie Knocks Door 3D
Your first match is one empty room: get in bed, start coins ticking, and keep the door up.
- 1Read the safety rules — The opening scroll is Dormitory Safety Instructions. Tap Got it when you have the six lines. They are the match rules, not flavor text.
- 2Start from the hospital hub — The menu sits in front of a Psychiatric Hospital at night. Start game is the center button. Lucky Wheel, Zombie mode (New), and Rated Items sit on the sides. The default child skin is In use; other portraits unlock with Obtain ads.
- 3Take an empty bedroom — After the match starts, find a room with nobody on the bed and go in. If someone is already sleeping there, leave at once.
- 4Stay in bed — Coins tick while you sleep (+2 at first, later +8 or +16 as the bed improves). Do not walk the hallway for sightseeing. Coins pay for the door and facilities.
- 5Fortify the door — When something hammers the door, tap Fortify / repair. Missions can ask you to Upgrade to Iron Door 2. A green bar on the door is HP; a red bar on the zombie is the threat.
- 6Build Light Crossbows — Empty floor tiles take defenses. A later mission asks you to Build two Light Crossbows. Place them before a LV.3 zombie is already chewing the frame.
- 7Tap classmate avatars — The top-left portraits are classmates. Tap one to check if that room is still safe. A red X means that classmate is already gone.
- 8Keep quiet when the lights go out — The sixth rule: if the lights are out, do not make a sound. If the zombie kills you, the screen still pays coins, with a 3x Claim ad next to Claim.
Core gameplay
Each run is a 3D dorm hold. Coins come from the bed, the door is the front line, and Light Crossbows turn that income into firepower.
Sleep for coins
You only earn coins in bed. Early ticks show +2; later rooms show +8 or +16. Get in bed before you open Fortify, or the door mission has nothing to spend.
Iron Door and Fortify
The door is what the zombie hits. Fortify is the wrench button. Upgrade to Iron Door 2 is an early mission. Doors can show a green HP bar while the zombie shows red.
Light Crossbows
Crossbows sit on the room floor and shoot toward the doorway. Build two Light Crossbows is a numbered mission. They are the first defense you place besides the door itself.
Classmates, not a dorm sim
Other beds fill at the same time. You do not manage their rooms. You tap a portrait to see if that classmate is still safe, and you stay out of a bed that is already taken.
Hospital hub extras
Lucky Wheel, Zombie mode (New), and Rated Items sit on the hub, not inside the first match. Zombie mode is a separate New button. Start game on the default In use skin first.
Look and setting
Zombie Knocks Door 3D is an isometric 3D dorm with grey tiles, low walls, and a night hospital on the hub. The view is why it feels closer than the 2D Haunted Dorm floor.
The hospital menu
The hub is a brick Psychiatric Hospital at night, iron fence, streetlamp, and a red-eyed scarecrow on the roof. Start game glows in the middle. Character slots sit in a grid below.
The dorm floor
Matches are a maze of small rooms and dark corridors. Your room can glow light-blue on the floor. Beds, iron doors, and wooden Light Crossbows sit in the same tile grid.
Reading the HUD
Top right is coins and lightning. Top left is Home plus classmate portraits. Missions float as numbered lines such as Upgrade to Iron Door 2. Fortify is bottom right; ResourcesX2 is an optional ad on the bottom left.
Tips
Early deaths come from entering a taken bed, walking the hall instead of sleeping, or building crossbows after a LV.3 zombie is already on your door.
Claim an empty bed first
The first rule is an empty bedroom. A taken bed is not yours. Leave it and find another room before coins can start.
Sleep before you Fortify
Coins tick in bed. Fortify and Iron Door 2 spend those coins. If you stand in the doorway reading the mission, you earn nothing.
Watch the portraits
Tap a classmate avatar when you need to know who is still safe. A red X is already a loss. Do not walk over to that room to look.
Crossbows before the LV.3 knock
Build two Light Crossbows while the door still has a green bar. A LV.3 zombie on the frame is late to start placing.
Killed still pays
If the zombie kills you, the screen still gives coins. Claim them, or use 3x Claim if you want the ad multiplier. That stash is what the hub skins sit behind, not a hidden rank.
