What is red circle on mission icon?

[Pixer]

What does the red circle mean that appears on mission icons? It seems to appear randomly. I have played the missions expecting something different but haven't noticed anything special. I apologize if this has already been answered, but I searched and couldn't find.

[Carapace]

This description sounds like you are describing the "Friends in this mission" icon. When someone on your friends list is in a 3D mission, the game notifies you on the map screen by showing you a circle with the social icon with the 3D mission icon. It also notifies you in the campaign screen with a numeric value in the corner of certain campaigns. Hope that answers your question!

[Pixer]

Yes, that answers my question. Thank you!