Board Thread:General Discussion/@comment-26638074-20180807020649/@comment-2601:283:4601:55D0:DCE8:3144:47D1:7100-20180901034134

63 will still be very difficult, as it was in BTD5. Round 36, the one with the pink rushes, will be even harder than the equivalent BTD5 round as the number of pinks is approximately doubled from BTD5. What might purple bloons become? I guess either leads or zebras, so no problem. What about fortified leads?

I was also thinking about BTDX mastery mode (we'll never see that), but that raises a question about purple bloons as well.