I have run Challenge 4 several times, and each time when I hit wave 43 the waves start coming really fast, at 4x speed the remaining 40 levels come out in about 10 seconds. I still manage to kill everything but it always gives me a defeat even though I never take any damage.
Any ideas whats happening.
I’ve just found a save in which I could access the challenge, played it and won just fine, it said “well done, 2 new achievements”.
If I recall correctly, if you’ve already completed a challenge once, you won’t get any visible indication of it, but it will result in “failed” message when you complete it again. So, doublecheck if you already have the Crystal Patch book - if you do, it’s possible that nothing is wrong 