Welcome to BOOM - Level 3 - The Refinery The Refinery, is where the difficulty really ramps up while continuing the BOOM story. In the rooms you'll find guards and zombies you must battle to find the real end. Look out for secret passages and be sure to complete all difficulty levels. 😱 - Choose 1 or 4 Difficulty Settings 🔫 - Fast Passed FPS Shooter 😈 - Eliminate all Guards and Zombies 🏆 - Complete all Objectives Made in UEFN and Unreal Engine 5