Quote Originally Posted by FBomb View Post
Is there a way to "stack" the playthrough attempts by purchasing multiple viral keys at a time or do I have to constantly come back after 15 runs to open up a new set of 15?
Not positive, but I don't think they stack. After finishing each set of 15 runs, I had to go get another key (and put my team together again because they didn't save each time I had to get a new key or refill ironite).