Should I Kill Everyone In The Dark Brotherhood Oblivion?

When It Makes Sense

• Good fit: You are pursuing a “pure assassin” or “clean‑slate” playthrough where eliminating every faction aligns with your role‑playing narrative and you want to experience the game’s ending without lingering obligations.
• Good fit: You have already completed the core Dark Brotherhood questline, obtained their unique weapons and armor, and are looking for a challenging side objective that offers high XP and unique loot.

When You Should Avoid It

• Warning sign: You are early in the main quest and still need the Dark Brotherhood’s assassination contracts to progress certain story beats or earn critical gold and experience.
• Warning sign: You enjoy the immersive lore and character interactions; wiping out the Brotherhood will permanently remove future dialogue, secret locations, and the chance to replay those quests with different outcomes.

Pros and Cons

Pros

• Eliminating the Brotherhood provides a sense of accomplishment and fits a self‑consistent role‑play where the player refuses to be part of a murderous cult.
• Completing the purge unlocks a unique achievement/trophy and grants a final bounty reward that can be a substantial cash boost.

Cons

• All remaining Dark Brotherhood quests become unavailable, meaning you miss out on exclusive weapons like the Blade of Woe and armor sets such as the Dark Brotherhood Attire.
• Some NPCs will become hostile or unresponsive, and the game’s world may feel less dynamic without the Brotherhood’s shadowy presence.

Decision Checklist

• Have you completed the main Dark Brotherhood questline and collected the unique gear you want?
• Do you prefer a narrative that removes the faction entirely, or do you enjoy revisiting its quests in future playthroughs?
• Is your character build capable of surviving the high‑level confrontations required to defeat the Master Assassin and his lieutenants?

Alternatives to Consider

If total eradication feels too final, you could instead focus on “cleaning” the Brotherhood by completing only the optional side contracts you deem necessary, then leaving the core members alive for future runs. Another option is to create a separate save file for a purge run, preserving your original save for a more traditional experience.

Final Recommendation

Kill‑everyone‑in‑the‑Dark‑Brotherhood can be a satisfying closure for a specific role‑play, provided you have already harvested the faction’s unique rewards and your character can handle the combat challenge. If you value the story content, diverse dialogue, or plan to replay the game, consider a partial approach or keep a separate save. As with any major in‑game decision, weigh the enjoyment of narrative depth against the thrill of a clean purge before proceeding.