Oblivion:Dark Brotherhood

Here are all of the Dark Brotherhood quests required for 100% Completion. Note that Eternal Exile is impossible to start without losing your faction rank, so it is omitted from this list. The Dark Brotherhood is notable for having several quests that are essentially a single step, which is to agree to a contract which starts another quest.

Initiation

• A Knife in the Dark

Exiles

• A Dark Exile
• Another Dark Exile
• Eternal Exile — This quest is impossible to complete without getting permanently expelled from the Dark Brotherhood, so it is omitted from the 100% run.

Misc.

• The Renegade Shadowscale
• Darkness Eternal
• Whispers of Death (Journal-Filled)

Sanctuary Contract Quests

Vicente

• Welcome to the Family
• A Watery Grave
• Blood of the Damned
• Accidents Happen
• No Rest for the Wicked
• Scheduled for Execution
• To Serve Sithis
• The Assassinated Man

Ocheeva

• My Brother's Keeper
• The Lonely Wanderer
• Enter the Eliminator
• Bad Medicine
• The Night Mother's Child
• Whodunit?
• The Assassin's Gambit
• Permanent Retirement

Lucien

• Of Secret and Shadow
• The Purification

Black Hand Quests

• The Dead Drop
• Affairs of a Wizard
• Next of Kin
• Broken Vows
• Final Justice
• A Matter of Honor
• The Coldest Sleep
• A Kiss Before Dying
• Following a Lead
• Honor Thy Mother