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Overboss Colter
Beating Fallout 4: Nuka-World's first boss, Overboss Colter can be very challenging...unless you know the secret to how to beat him.
Battling Colter is the last step in completing The Gauntlet.
Once you've entered the locker room, talk to Gage through the intercom. He'll lead you to the Thirst zapper, a squirt gun hidden in a nearby locker.
While you're here, you may also want to pick up ammo and a nearby minigun, and possibly some Mini Nukes for your Fat Man launcher if you brought it along.
You're not done prepping yet, though. Before entering the arena, take this Fusion Core. It will weaken your enemy significantly in the upcoming encounter.
Enter the arena squirt-gun in hand. Blast your opponent at close range. A flash will indicate his shield is down.
Quick-switch to your Minigun, Mininuke, modified Alien Blaster, Plasma pistol, or other high-powered weapon. Fire quickly at the enemy's head while his shield is down.
The enemy's shield will gradually recharge into two stages, one indicated by a faint force field (partial defense) and a brighter, full-defense shield.
While it's possible to keep lowering his shield during the weak stage by switching constantly between the squirt gun and your main weapon, we found it much more practical to lower his shield, blast away at close range, then duck behind cover, reload, heal up with a healing item, reequip the squirt gun, then rush in again and repeat the process.
Your enemy is tough, but you'll take him down in a few minutes if you follow this pattern.