Unlike normal assets, they have no value and cannot be acquired randomly through an Acquire Assets action. They are obtained either through Mythos cards, location encounters, on an Adventure, or through other specified game effects. Unique Assets are possessions and may be traded with other investigators. There is no limit to the number of Unique Assets an investigator may have.
The term "Asset" refers to both Assets and Unique Assets. However, an investigator gains a Unique Asset only if the effect specifically calls for a Unique Asset.
"Non-Unique Assets" refers to Assets but not Unique Assets.