In time, post-apocalyptic Orks would rule the world. The goal of the Master’s Army was send a green tide across California, capturing as many people as possible and transforming them into super mutants. Fallout 2 suffered from this problem as well, not because of the trope, but because the first game had already done that story. How much worse can it get? As a result, genre b-movies typically feature pointlessly genocidal antagonists. The problem with designing a credible threat in a post-apocalyptic setting is that the world is already destroyed.
While there are a lot of interesting Enclave interactions in Fallout 2 (Salvatore’s deal, Navarro, etc), I want to focus on the main story and faction goals. That’s a great dynamic and it gets the point across. This makes Horrigan the Darth Vader of Fallout 2, a big scary robot inquisitor. Whoever this giant works for is brutal, vengeful, and secretive. The man and his family are mowed down without remorse. Horrigan gives the farmer an ultimatum: return to the Enclave or die. Some people in the wrong place at the wrong time.