This is the first ever walkthrough I made, so it might not be a good one. Anyways on with the guide! (Also since I haven't beat the game I'll update this guide as I go on.)

Things you need for a gold star:

• Kill The Bad Guy
  
• Secondary Objective
  
• Kill him in Day 1
  
• Catch the Tooth
  
• Find the Passport

Kill The Bad Guy

Pretty self explanatory. Kill the bad guy.

Secondary Objective

Each level has a secondary object. You'll have to figure out what it means and kill the bad guy in this specific way.



For this case in 1-1, you'll have to kill the bad guy with an explosion.

Kill him in Day 1

Pretty self explanatory also. You got to kill him before the day ends. Which is the bad guy walking out of the map/area.

Catch the Tooth

When the bad guy dies, His tooth will fly out. You'll have to click it before it disappears.



Find the Passport

There is a passport hidden in ever level.


For example in 1-1 It is hidden under the car.

Secondary Objective
You have to kill him with an explosion.


Passport
Under the car on the right.



Secondary Objective
Position the ball at around that angle and cut it before it touches the bad guy, and instead roll over him.


Passport
In the consrtuction.



Secondary Objective
Don't really know how to explain this but. Kill him with the piano next to the truck. First put the barricade around the building to make him walk around by the van. Then tie the rope with the piano and hang it on the building. Just cut the rope when he is under the piano.


Passport
Under the Piano.



Secondary Objective
For this, you'll have to sabotage the pipe on the left while he is not looking. Then alert him while he is walking through that hallway of buildings. He'll then run towards the gas and just light that gas while he is nearby.



Passport
At the top left of the map In the building



Secondary Objective
First sabotage all the fire hydrant. Then wait for him to touch the water before cutting the wire on the right.


Passport
Under the middle bench on the left side.



Secondary Objective
This is tricky. You'll have to lanuch the car at around 50% and hit the roof so that the car catches fire and then land on the bad guy.



Passport
In the buildings



Secondary Objective
Just tie the rope to the tree. Launch the dead dog at the bottom of the map.


Passport
In the park-thingy.



Secondary Objective
Just Place the trap there. Pull it when he walks over but don't let go yet. Swing the body to the tree and hopefully blood gets there.



Passport
Under the car.



Secondary Objective
Just make sure that the "Slingshot/Bow" Hits the bad guy and the stick hits the police car.


Passport
Under the Left barricade.



Secondary Objective
(Thanks to lighting.b on how to solve this)
Set it up as shown.

Light the middle car on fire then launch the car at the far end.

Use around 50-60% So it goes over but not too far.


Passport
Launch one of the car and explode it. The passport is under the middle car.



Secondary Objective
Just try to converse your "ammo" not sure how much is the minimum though. But try to use as little as possible.
(Thanks to lighting.b again) The sum of your spears + saw have to add up to 6 or more to get the star.
Note that the tooth is dropped by the last zombie so don't miss it :P


Passport
Under the car.

This is it. The end of chapter one. I might add chapter two once I cleared it.