How to replay secret mission after killing all ubercommanders?

[bulletshowerr]

I am trying to archieve all collectibles to get trophies.

So far i have this:
Gold 50/50
Starcards 74/75
Concepts 47/50
Max toys 15/15
Deathcards 16/16
Records 10/10

The Starcard doesnt have white marker, it is full with black markers. Same for Concepts. I have read somewhere there are some archievements to pickup in a secret mission after killing all ubercommanders. I want to replay that secret mission but how to do that?

[bulletshowerr]

I have figured out by myself. The secret mission is Riverside in New York.

When playing Riverside mission the empty markers are visible and i get finally the last
missing collectibles and earned the trophies "Meet the cast" and "Art aficiano". When exit the Riverside mission the line with "Riverside" and its markers are dissappeared but it is still showed Starcard 75/75 and Concepts 50/50.