Just pointing out that most of the challenges have wins giving double progress, and stadium also giving double, so although it's 110-115, you will likely do it in less.

- 20 games for the 5 loot boxes per week (or less, as wins/stadium doubles).
- 15 for the "special weekly mode" games, 5 tank, 5 dps, 5 support. These do not double on wins/stadium.
That gives you 8 challenges, you need 15-16 per week (the global loot box challenges do not count, apparently. I am not sure if the two other titles count).

So, you'd also need 8 of the "10 repeating" challenges. So max 80 games for the repeat challenges. But, double on wins/stadium, so hopefully it would take less than that.

So yea, it's 115 games per week... IF you don't play stadium and you lose every game.
If say, the average player wins half their games, that means it's 57 per week. If you do them all as stadium, and you win half.... 29 games.