Board Thread:Game Discussion/@comment-9890645-20150213121239/@comment-25158127-20150301213156

104.10.157.35 wrote: Automaster here, I'm stuck at Combiner chapter 10. Shockwave boss says battle error. Anyone get past him? Yes, I have gotten past him. At the moment I am at Battlefield Earth, chapter 9, trying to defeat Megs.

Battlefield Earth is unlocked after you have completed all 13 chapters of Combiner.