Talk:Orokin Void/ByRewards/@comment-95.76.194.176-20160406203849/@comment-50.153.181.48-20160406213614

It stands for C rotation. In survival, every 5 minutes is a rotation, in the standard cycle of A A B C / A A B C. You'll get a C-rotation drop every 20 minutes in survival, every 20 waves in defense, every 4 rounds in Interception, every 4 extractors in Extraction, and so on.