Australia Day (Jan. 26 - Feb. 2) Edit
During Australia Day, a few unique items can be found. Australia's flag also spawns in the foyer.
This will not appear on the player's list, but collecting all of the Australian flags on Australia day will give one the Flag Finder achievement.
Shrimp is also an item that the player will not typically be asked to find. It can be found in the fridge in the kitchen. Putting the shrimp on the barbecue in the garage will give the player the "Shrimp at the Barbie" achievement.
The didgeridoo is an instrument native to Australia. It is colorful, with different colored bands. It can only be found on the back of the sofa in the family room.
The boomerang is an item that may appear on one's list. It can be found in the first bedroom.
The player will not usually be asked to find is the stuffed koala bear. It is light grey in color and can be found hanging from the cabinets in the kitchen, the shelf in the garage, in the office on the bookshelf, or in the second bedroom.
Easter (April 18- April 25) Edit
During the Easter season, eggs can be found throughout the house. They appear to have no purpose.
A giant blue bunny resides in the foyer during the season.
Bunny Window Decorations
Bunny window decorations can be found throughout the house.
Halloween (Oct. 20- Nov. 11) Edit
During the Halloween Season, there are many items around the house that are unique to that time.
Candy shows up in many places in almost every room. It takes the appearance, generally, of candy bars.
This item is a skull which can be found in places such as the upstairs banister and inside the different bedrooms.
The witch's hat is a black pointed hat that can be found on any of the many tall pink floor lamps. It is thus not a good item to go after specifically, and is better to find while in pursuit of other objects. It can sometimes be found in the office, as there is a floor lamp there.
The black cat appears to be a small black cat statue, which can be found all over the house; in places such as on top of bookshelves, and, on occasion, behind boxes.
Christmas (Dec. 1- Dec. 31) Edit
During the Christmas Season, there are a few different extra items that you can loot.
During the Christmas Season, twelve Candy Canes can be found around the house. Acquiring all of them in one round gets you the achievement "Sweet Tooth Thief". They are medium-sized, and red-and-white striped. Some may not appear in the same spot every time.
During the Christmas Season, there will also be ten Christmas Presents that can be found around the house. Unlike Candy Canes, Christmas Presents will always be found in the same spot and are, therefore, very simple to quickly grab each time you play. Collecting all ten of them in one round gets you the achievement "Present Fiend".