Collaborative events are a sub-category of events. Collaborative events are less related to CoS, and exist more so for promoting something, such as a band or artist. As such, prices obtained from these events are usually purely cosmetic, such as Cottol's second palette on Legacy gameplay or a Roblox item.

Due to these, these events are not guaranteed to return annually, and are usually far less likely to return than any other event, with none of the exclusively collaborative ones having ever returned yet.