Hi everyone, I’m wiriting in order to know where can I look at my weekly challenges in Halo: MCC PC. When I finish a mission in campaing, the game notificates me with a message which says that I have completed a challenge, and it gives me EXP. The problem is that I don’t know where can I see my challenges. If anyone can help me, I would be very thankful. 
Currently there is no way to view challenges within the game. You just have to make a note of what games you have completed.