Once inside the main lab, your objective is to retrieve specific research samples that shed light on Krieger's experiments. These samples are typically located in secure containment units or on laboratory benches. The lab itself will be heavily guarded by both mercenaries and a higher concentration of Trigens. Some Trigens might be in cages, which can be accidentally or intentionally opened, adding to the chaos. Prioritize taking out the human guards first, as they often carry better weapons. After securing the samples, be prepared for a lockdown or a surge of enemies as the facility detects your intrusion. You'll then need to find an exit.
