This is the main boss fight against the Nemesis T-Type. The Nemesis has multiple phases and is incredibly durable. It uses its rocket launcher, tentacle attacks, and powerful melee strikes. Refer to the 'Boss Guides' section for a detailed strategy. In summary, focus fire on its exposed head when it's not wearing its limiter, and use explosives to stun it. When it enters its second phase, its tentacles become a major threat; target the glowing weak points on its body.
The arena will have environmental hazards and possibly some power-ups or heavy weapons. Utilize these to your advantage. Team coordination is absolutely critical here. Have one or two operatives draw its attention while others flank and deal damage. Bertha's healing abilities will be invaluable. This will be a long and challenging fight, requiring patience and precise aiming. Once its health is depleted, a final cutscene will play, confirming its elimination.