Although the first group of survivors were able to overcome the ferocious Birkin Stage Three mutation and escape, the mutant was not so easily defeated. Lurking in the darkness and regaining its strength, the creature was merely biding its time until the second group of survivors arrived. Can such a monster ever truly be defeated? It’s time to step up and escape the nightmare once and for all! The Malformations of G: B-Files Expansion introduces two new boss encounters to your B-Files Expansion scenarios. Prepare to face the fearsome Birkin Stage One and enormous Birkin Stage Five bosses—the latter big enough to fill a whole tile!