The locations of the ornaments in First contact goes as follows
On top of the piano
Next to the tree on the TV stand
On the Fireplace behind the photo
On the bottom shelf behind the (American)football in the closet
In the sink of the bathroom
In the tub of the bathroom
The locations of the ornaments in Close Encounters goes as follows
On the shelf behind the photo
In the bottom left drawer of the masters bedroom
Next to the toilet in the bathroom
Behind the clothes basket in the “gamer’s/teen’s” bedroom
On the lamp in the office room
On the middle shelf next to the Arachno-Gauntlet in the secret room
The locations of the ornaments in Domestic duty goes as follows
In the trash can in the kitchen
In the cabinet to the right of the dishwasher
Behind the bread box in the corner of the kitchen
In the Laundry room on the shelf
Next to the door to the garage
In the wheelbarrow
The last is under the back of the car
The locations of the ornaments in Major Inconvenience goes as follows
On the shelf under the scanner
In the Ice Cream freezer
On a shelf near the freezers
On top of the semi-truck
In the first wooden spool
In an open box next to the blue car
In the rain gutter to the left of the exit
The locations of the ornaments in Garden of Evil goes as follows
Beside the door behind you when you first load in
On the rail near the tree
Hanging on the closest cherry blossom tree
On the large rock next to the shrine
Behind the Arachno-Gauntlet
Hanging off the shrines corners
Hanging on the side of the exit
On the first food stall
On the roof overhang of the barn
On the side of the tractor
On the light over the entrance to the barn
In the hay shed across from the barn behind the support beam
Under the Assault Rifle case
On the ceiling of the barn
Under the couch of the first room
On the printer
Behind the drawing tablet
In the vending machine
In the urinal on the right in the men’s bathroom
In the second toilet from the left in women’s bathroom
On top of the projector in the conference room
In the trophy up on the shelf in the office
In the corner behind the door in the bathroom
In the mini-fridge in the hallway
On the machine on the left side of the main room
Behind the boxes next to the door to the armory
Behind the first computer in the generator room
Behind the planter to the right in the break room
On the desk on the Exterminator’s office
Behind the door to the exterminator’s office
In the Partner’s room behind the file cabinet
Behind the boxes in the hallway
Hanging from the floodlight
On top of the speaker
Hanging from the letters of the Exterminator’s building
Now I will tell you the order they come in and more about the item.
The first time you collect all of the ornaments you get the weapon “Laser Sword”
This weapon can light things on fire and is a fast melee with a fairly large range.
The second time you collect all of the ornaments you get the upgrade “Spider Noir”
This makes your screen have a noir color theme, which if you don’t know is like a black and white filter but with more grays and blacks than whites.
The third time you collect all of the ornaments you get “+10 upgrade points”
The Fourth time you collect all of the ornaments you get the upgrade “Lucky Dice”
This is an item that can be equipped onto the Tracker, its a pair of red dice.
The fifth time you collect all of the ornaments you get “+10 tracker upgrade points”
The sixth time you collect all of the ornaments you get “Low Gravity”
This is an upgrade that does exactly as it says, it makes the in-game gravity lower
The seventh time you collect all of the ornaments you get the “Radioactive wasabi flavor”
This is a cheese ball flavor that turns spiders into radioactive spider
The eighth time you collect all of the ornaments you get the weapon “Laser Gun”
This is a gun that has unlimited ammo, can light things afire and has a fairly good fire rate
The last time you collect all of the ornaments you get the upgrade “Gene Splicer”
This upgrade randomizes the spider types that spawn in a level, which can create some newer experiences