Complex sentence: Regardless of the reasons for his/her exile the player must now face the unforgiving wilderness with its dangerous inhabitants, alongside the crumbling ruins and bloody secrets of the Eternal Empire and the Vaal civilization that came before, and band together with other outcasts to survive.
Split into simpler sentences: Regardless of the reasons for his/her exile, the player must now face the unforgiving wilderness and its dangerous inhabitants. Amidst the crumbling ruins and bloody secrets of the Eternal Empire and the Vaal civilization that came before, and band together with other exiles to survive.