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Bug Verification Project
This article is within the scope of the Bug Verification Project. This project is dedicated to increasing the validity of game bugs. If you want to participate, please check the project page.
Isaac works for the Gun Runners as a supply manager for around 5 years.[1] You first encounter him when you reach the Gun Runner trading kiosk on the outside of the Gun Runner compound.
Dealing with Contreras: Isaac will need the player to bring back 100 pieces of scrap metal in order to manufacture the wares Contreras asks for; this can also be completed by using Speech 80 or Barter 80.
He lives in his house almost directly east of the Gun Runners' kiosk and across the street from the Hostetler home. Entering the house will result in Karma penalty, and he threatens you to leave. However, you can still initiate dialog with him after this.
On rare occasions, Isaac may be killed by randomly spawning Fiends that may appear in the area near the Gun Runners' factory, or nearby his house to the east (spawns at night).
Isaac is bald under his hat.
It's interesting to note that although he works and backs the Gun Runners, he is usually found wielding a one-handed plasma weapon, such as a plasma pistol.
pcps3xbox360 After Isaac enters his home, he may not exit it again. [verified]
To fix this bug, go into his home at night. When he tells you to leave, do so, and wait outside his home till daylight. At this point, Isaac should begin traveling to Gun Runners again.
Another way to solve the bug, is to simply enter his house at any time. Sometimes just the action of entering his house can result in him immediately leaving with no talking needed.
↑"The Courier: So you work for the Gun Runners? Isaac: For around five years now. I handle the supply ends of things - raw materials and stuff." – In-game dialogue