• Free
  
  • Hall of the Mark
    
  • Heyton's Rest
    
  • Necromancer's Doom
    
  • Redemption (quest)
    
  • Sacrifices
    
  • Stopping the Sahuagin
    
  • The Cannith Crystal
    
  • The Collaborator
    
  • The Grotto
    
  • The Storehouse's Secret
    
  • The Voyage

• Free
  
  • Arachnophobia
    
  • Bringing the Light
    
  • Durk's Got A Secret
    
  • Garrison's Missing Pack
    
  • Haverdasher
    
  • Information is Key
    
  • Misery's Peak
    
  • Missing in Action
    
  • Protect Baudry's Interests
    
  • Recovering the Lost Tome
    
  • Retrieve the Stolen Goods
    
  • Stealthy Repossession
    
  • Stop Hazadill's Shipment
    
  • The Kobolds' New Ringleader
    
  • The Miller's Debt
    
  • The Smuggler's Warehouse
    
  • The Sunken Sewer
    
  • Walk the Butcher's Path

• Free
  
  • An Explosive Situation
    
  • Home Sweet Sewer
    
  • Kobold Assault
    
  • Redfang the Unruled
    
  • The Captives
    
  • The Kobold's Den: Clan Gnashtooth
    
  • The Kobold's Den: Rescuing Arlos
    
  • The Old Archives
    
  • The Swiped Signet
    
  • Where There's Smoke...
• Assault on Splinterskull
  
  • First Strike
    
  • The Hobgoblins' Captives
• Catacombs
  
  • Endgame: Marguerite
    
  • Setting the Wards: The Lower Cathedral
    
  • Setting the Wards: The Patriarchs' Crypt
    
  • The Crypt of Gerard Dryden
    
  • The Friar's Niece
    
  • To Find a Witness: Archbishop Dryden
    
  • To Find a Witness: Return to the Sanctuary
• The Seal of Shan-to-Kor
  
  • The Cloven-jaw Scourge: Blockade
    
  • The Sacred Helm

• Free
  
  • Freshen the Air
    
  • Irestone Inlet
    
  • Proof is in the Poison
    
  • Rest for the Restless
    
  • The Depths of Darkness
    
  • The Depths of Despair
    
  • Venn's Trail: Clan Tunnelworm
    
  • Venn's Trail: Venn's Fate
• Catacombs
  
  • Endgame: The Archbishop's Fate
• Assault on Splinterskull
  
  • Whisperdoom's Spawn
    
  • Yarkuch's War-plans
• The Seal of Shan-to-Kor
  
  • The Cloven-jaw Scourge: The Caverns of Shaagh
• The Sharn Syndicate
  
  • Come Out and Slay
    
  • Dirty Laundry
    
  • Repossession
    
  • Stand Your Ground
    
  • The Bookbinder Rescue
    
  • The Stormreaver Fresco

• Free
  
  • Archer Point Defense
    
  • The Chamber of Insanity
    
  • The Depths of Discord
    
  • The Depths of Doom
    
  • The Lair of Summoning
• Assault on Splinterskull
  
  • The Deadly Package: Agent of the Darguul
    
  • The Deadly Package: The Stronghold Key
• Delara's Tomb
  
  • The Mystery of Delera's Tomb
• Litany of the Dead Part I
  
  • Tomb of the Burning Heart
    
  • Tomb of the Crimson Heart
    
  • Tomb of the Immortal Heart
    
  • Tomb of the Sanguine Heart
• Phiarlan Carnival
  
  • A Small Problem
    
  • Partycrashers
    
  • The Snitch
    
  • Under the Big Top
• The Seal of Shan-to-Kor
  
  • Halls of Shan-To-Kor
• Three-Barrel Cove
  
  • Brood of Flame
    
  • Ghost of a Chance
    
  • Guard Duty
    
  • Prove Your Worth
    
  • The Legend of Two-Toed Tobias
    
  • The Stones Run Red

• Free
  
  • Caged Trolls
    
  • Dead Predators
    
  • Gladewatch Outpost Defense
    
  • Mirra's Sleepless Nights
    
  • Purge the Heretics
    
  • Redwillow's Ruins
    
  • Ruined Halls
    
  • The Bounty Hunter
    
  • The Forgotten Caverns
• Assault on Splinterskull
  
  • Doom of the Witch-doctor: The Way to Zulkash
    
  • Doom of the Witch-doctor: Zulkash, Herald of Woe
• Delara's Tomb
  
  • Return to Delara's Tomb
    
  • Valak's Mausoleum
• Devil Assault
  
  • The Chronoscope
• Litany of the Dead Part I
  
  • The Bloody Crypt
• Sorrowdusk
  
  • The Iron Mines: Freeing Achka
    
  • The Iron Mines: Justice for Grust
• Three-Barrel Cove
  
  • The Troglodytes' Get

• Free
  
  • Gwylan's Stand
    
  • Taming the Flames
    
  • The Graverobber
    
  • The Pit
    
  • The Tear of Dhakaan
• Assault on Splinterskull
  
  • The Last Move: The Way to Yarkuch
    
  • The Last Move: Yarkuch's Last Stand
• Delara's Tomb
  
  • Free Delera
    
  • The Missing Party
• Sentinals of Stormreach
  
  • Bargain of Blood
    
  • Storm the Beaches
    
  • The Black Loch
    
  • The Tide Turns
• Sorrowdusk
  
  • The Grey Moon's Den: Extermination
    
  • The Grey Moon's Den: The Trollish Scourge
• Temple of Elemental Evil
  
  • Temple of Elemental Evil Part 1
    
  • Temple of Elemental Evil Part 2
• Three-Barrel Cove
  
  • Old Grey Garl
    
  • The Scoundrel's Run

• Free
  
  • Caverns of Korromar
    
  • Haunted Library
    
  • Stormcleave Outpost
    
  • Stromvauld's Mine
    
  • The Faithful Departed
    
  • The Path to Madness
    
  • The Xorian Cipher
• Delara's Tomb
  
  • Thrall of the Necromancer
• Litany of the Dead Part II
  
  • Tomb of the Shadow Guard
    
  • Tomb of the Shadow King
    
  • Tomb of the Shadow Knight
    
  • Tomb of the Shadow Lord
• Ruins of Threnal
  
  • In Need of Supplies
    
  • The Rescue
• Sentinals of Stormreach
  
  • Spies in the House
• Sorrowdusk
  
  • The Temple Outpost: Captives of the Cult
    
  • The Temple Outpost: The Libram of the Six
• Vault of Night
  
  • Tharashk Arena
    
  • The Prisoner

• Free
  
  • The Church and the Cult
• Delara's Tomb
  
  • The Keeper's Sanctuary
• Litany of the Dead Part II
  
  • The Shadow Crypt
• Red Fens
  
  • Fathom the Depths
    
  • Into the Deep
    
  • The Claw of Vulkoor
    
  • The Last Stand
• Ruins of Threnal
  
  • Entering the Gate Chamber
    
  • The Giant Lieutenants
    
  • The Giants' Lair
    
  • The Library of Threnal
    
  • The Missing Expedition
    
  • The Threnal Arena
• Sorrowdusk
  
  • The Fane of the Six: Cleansing the Temple
    
  • The Fane of the Six: Fall of the Prelate
• Vault of Night
  
  • Gateway to Khyber
    
  • Haywire Foundry
    
  • The Jungle of Khyber

• Free
  
  • Hiding in Plain Sight
    
  • Reclamation
    
  • Sykros' Jewel
    
  • Tempest's Spine
• Demon Sands
  
  • The Chamber of Rahmat
• Restless Isles
  
  • Bring Me the Head of Ghola-Fan!
    
  • Slavers of the Shrieking Mines
• Ruins of Threnal
  
  • Escort the Expedition
    
  • Hold for Reinforcements
    
  • Secure the Area
    
  • The Gate Chamber
    
  • The Giants' Supplies
• Sorrowdusk
  
  • The Sanctum: Church of the Fury
    
  • The Sanctum: Quench the Flames
• Vault of Night
  
  • Plane of Night
    
  • The Vault of Night

• Free
  
  • Dreams of Insanity
    
  • Made to Order
    
  • The Enemy Within
    
  • The Spawn of Whisperdoom
• Delara's Tomb
  
  • And the Dead Shall Rise...
    
  • From Beyond the Grave
• Demon Sands
  
  • An Offering of Blood
    
  • Desert Caravan
    
  • Maraud the Mines
    
  • Purge the Fallen Shrine
    
  • Raid the Vulkoorim
    
  • The Chamber of Kourush
• Litany of the Dead III
  
  • Tomb of the Blighted
    
  • Tomb of the Forbidden
    
  • Tomb of the Tormented
    
  • Tomb of the Unhallowed
• Restless Isles
  
  • The Twilight Forge

• Free
  
  • A Relic of a Sovereign Past
    
  • Diplomatic Impunity
    
  • Eyes of Stone
    
  • Frame Work
    
  • Invaders!
• Demon Sands
  
  • Against the Demon Queen
    
  • Chains of Flame
    
  • The Chamber of Raiyum
    
  • Zawabi's Revenge
• Litany of the Dead III
  
  • The Cursed Crypt
• Restless Isles
  
  • The Titan Awakes

• Free
  
  • Mired in Kobolds
• Attack on Stormreach
  
  • Assault on Summerfield
    
  • Blockade Buster
    
  • Siegebreaker
    
  • Undermine
• Ruins of Gianthold
  
  • A Cry for Help
    
  • Feast or Famine
    
  • Foundation of Discord
    
  • The Maze of Madness
    
  • Trial by Fire

• Trials of the Archons
  
  • Demon Assault
    
  • The Archon's Trial
    
  • The Devil's Details
  
  
  Level 14 Quests
  • Free
    
    • -NONE-
  • Litany of the Dead IV
    
    • Desecrated Temple of Vol
      
    • Flesh Maker's Laboratory
      
    • Ghosts of Perdition
      
    • Inferno of the Damned
  • Ruins of Gianthold
    
    • A Cabal for One
      
    • Gianthold Tor
      
    • Madstone Crater
      
    • The Crucible
      
    • The Prison of the Planes
      
    • The Reaver's Fate
• The Devil's Gambit
  
  • Grim and Barett
    
  • Multitude of Menace
    
  • Subversion
    
  • Tavern Brawl
  
  
  Level 15 Quests
  • Free
    
    • Acid Wit
      
    • Delirium
      
    • Disciples of Shar
      
    • Escape Plan
  • Harbinger of Madness
    
    • Fear Factory
      
    • In The Flesh
      
    • Missing
      
    • Sinister Storage
  • Litany of the Dead IV
    
    • Litany of the Dead
  • Shadowfell Expansion
    
    • Shadow of a Doubt

• Free
  
  • Beyond the Rift
    
  • Servants of the Overlord
    
  • The Lords of Dust
    
  • The Mask of Deception
    
  • The Spinner of Shadows
• Shadowfell Expansion
  
  • A Lesson in Deception
    
  • Army of Shadow
    
  • Friends in Low Places
    
  • The Thrill of the Hunt
    
  • Through a Mirror Darkly
• The Vale of Twilight
  
  • Let Sleeping Dust Lie
    
  • Rainbow in the Dark
    
  • Ritual Sacrifice
    
  • Running with the Devils
    
  • The Coalescence Chamber

• Free
  
  • -NONE-
• Reaver's Reach
  
  • Enter the Kobold
    
  • Monastery of the Scorpion
    
  • Prey on the Hunter
    
  • Stealer of Souls
• Reign of Madness
  
  • Acute Delirium
    
  • The Lord of Eyes
    
  • The Lord of Stone
    
  • The Sane Asylum
• The Druid's Deep
  
  • Outbreak
    
  • Overgrowth
    
  • The Druid's Curse
    
  • Thorn and Paw
• The Litany of the Dead IV
  
  • Ascension Chamber
• The Vale of Twilight
  
  • The Shroud

• Free
  
  • In the Demon's Den
• Heart of Madness
  
  • Fashion Madness
    
  • Palace of Stone
    
  • Terminal Delirium
• The Path of Inspiration
  
  • I Dream of Jeets
    
  • Dream Conspiracy
    
  • Finding the Path
    
  • The Mindsunder
    
  • The Shipwrecked Spy
• The Vale of Twilight
  
  • A Vision of Destruction
    
  • Hound of Xoriat

• Free
  
  • Murder by Night
    
  • The Riddle
• Secrets of the Artificers
  
  • Blown to Bits
    
  • Power Play
    
  • Schemes of the Enemy
    
  • The Master Artificer
• Shadowfell Expansion
  
  • A Break In the Ice
    
  • Breaking the Ranks
    
  • Lines of Supply
    
  • The Tracker's Trap
    
  • What Goes Up
• The Devils of Shavarath
  
  • A New Invasion
    
  • Bastion of Power
    
  • Genesis Point
    
  • Sins of Attrition
    
  • The Weapons Shipment
    
  • Wrath of the Flame
• The Dreaming Dark
  
  • Eye of the Titan
    
  • Mining for Ancient Secrets
    
  • Raiding the Giants' Vault
    
  • Reclaiming Memories

• Free
  
  • -NONE-
• Secrets of the Artificers
  
  • The Lord of Blades
• The Devils of Shavarath
  
  • Tower of Despair
• The Dreaming Dark
  
  • The Dreaming Dark
• EPIC VERSIONS
  
  • A Small Problem [Phiarlan Carnival]
    
  • Bargain of Blood [Sentinels of Stormreach]
    
  • Partycrashers [Phiarlan Carnival]
    
  • The Black Loch [Sentinels of Stormreach]
    
  • The Chronoscope [Devil Assault]
    
  • The Snitch [Phiarlan Carnival]
    
  • The Tide Turns [Sentinels of Stormreach]
    
  • Under the Big Top [Phiarlan Carnival]

• Free
  
  • -NONE-
• Menace of the Underdark
  
  • Impossible Demands
    
  • The Lost Thread
    
  • The Battle for Eveningstar
    
  • The Unquiet Graves
• EPIC VERSIONS
  
  • An Offering of Blood [Demon Sands]
    
  • Beyond the Rift [Free]
    
  • Devil Assault [Devil Assault]
    
  • Fathom the Depths [Red Fens]
    
  • Into the Deep [Red Fens]
    
  • Servants of the Overlord [Free]
    
  • Spies in the House [Sentinels of Stormreach]
    
  • Tharashk Arena [Vault of Night]
    
  • The Claw of Vulkoor [Red Fens]
    
  • The Last Stand [Red Fens]
    
  • The Lords of Dust [Free]
    
  • The Prisoner [Vault of Night]
    
  • The Spinner of Shadows [Free]

• Free
  
  • -NONE-
• Menace of the Underdark
  
  • Don't Drink the Water
    
  • In the Belly of the Beast
    
  • The House of Broken Chains
    
  • The House of Death Undone
    
  • The House of Rusted Blades
    
  • The Portal Opens
• EPIC VERSIONS
  
  • Against the Demon Queen [Demon Sands]
    
  • Chains of Flame [Demon Sands]
    
  • Haywire Foundry [Vault of Night]
    
  • Plane of Night [Vault of Night]
    
  • The Chamber of Raiyum [Demon Sands]
    
  • The Jungle of Khyber [Vault of Night]
    
  • The Lord of Blades [Secrets of the Artificers]
    
  • The Master Artificer [Secrets of the Artificers]
    
  • The Vault of Night [Vault of Night]
    
  • Zawabi's Revenge [Demon Sands]

• Free
  
  • -NONE-
• Menace of the Underdark
  
  • Reclaiming the Rift
    
  • The Deal and the Demon
    
  • Trial by Fury
• EPIC VERSIONS
  
  • Outbreak [The Druid's Deep]
    
  • Overgrowth [The Druid's Deep]
    
  • The Druid's Curse [The Druid's Deep]
    
  • Thorn and Paw [The Druid's Deep]

• Free
  
  • -NONE-
• High Road of Shadows
  
  • A Stay at the Inn
    
  • Detour
    
  • Lost in the Swamp
    
  • Rest Stop
    
  • The End of the Road
• Menace of the Underdark
  
  • Caught in the Web
• Ruins of Gianthold
  
  • Return to Cabal for One
    
  • Return to Gianthold Tor
    
  • Return to Madstone Crater
    
  • Return to Prison of the Planes
• EPIC VERSIONS
  
  • A Cry for Help
    
  • Feast or Famine
    
  • Foundation of Discord
    
  • The Crucible
    
  • The Maze of Madness
    
  • Trial by Fire

• Free
  
  • -NONE-
• Ruins of Gianthold
  
  • The Fall of Truth

• Three-Barrel Cove
  
  • A Legend Revisited
    
  • Old Tomb, New Tenants
    
  • Precious Cargo

• EPIC VERSIONS
  
  • Ghost of a Chance [Three-Barrel Cove]
    
  • Prove Your Worth [Three-Barrel Cove]

• Free
  
  • --NONE--
• EPIC VERSIONS
  
  • A Lesson in Deception [Shadowfell Expansion]
    
  • Army of Shadow [Shadowfell Expansion]
    
  • Fashion Madness [Heart of Madness]
    
  • Friends in Low Places [Shadowfell Expansion]
    
  • Palace of Stone [Heart of Madness]
    
  • Terminal Delirium [Heart of Madness]
    
  • The Thrill of the Hunt [Shadowfell Expansion]
    
  • Through a Mirror Darkly [Shadowfell Expansion]

• Free
  
  • --NONE--
• EPIC VERSIONS
  
  • A Break In the Ice [Shadowfell Expansion]
    
  • Breaking the Ranks [Shadowfell Expansion]
    
  • Lines of Supply [Shadowfell Expansion]
    
  • The Tracker's Trap [Shadowfell Expansion]
    
  • What Goes Up [Shadowfell Expansion]

• Free
  
  • Brothers of the Forge
• Haunted Halls of Eveningstar
  
  • Haunted Halls of Eveningstar

• Free
  
  • --NONE--
• EPIC VERSIONS
  
  • Desecrated Temple of Vol [Litany of the Dead 4]
    
  • Flesh Maker's Laboratory [Litany of the Dead 4]
    
  • Ghosts of Perdition [Litany of the Dead 4]
    
  • Inferno of the Damned [Litany of the Dead 4]

• Free
  
  • --NONE--
• EPIC VERSIONS
  
  • Defiler of the Just[Trial of the Archons]
    
  • Demon Assault[Trial of the Archons]
    
  • Fire on Thunder Peak [Shadows Under Thunderhome]
    
  • Grim and Barett[The Devil's Gambit]
    
  • Mark of Death [Litany of the Dead 4]
    
  • Multitude of Menace[The Devil's Gambit]
    
  • Subversion[The Devil's Gambit]
    
  • Tavern Brawl[The Devil's Gambit]
    
  • Temple of Elemental Evil Part 1 [Temple of Elemental Evil]
    
  • Temple of Elemental Evil Part 2 [Temple of Elemental Evil]
    
  • Temple of the Deathwyrm [Shadows Under Thunderhome]
    
  • The Archon's Trials[Trial of the Archons]
    
  • The Devil's Details[Trial of the Archons]
    
  • The Mask of Deception [Free]

If the above didn't hint at it, as one levels up, the available quests to a free player diminishes. There are also levels where there is a glut of quests when compared to other levels, even with paid-for content. As time goes on and quests are added, this has evened out.

Put graphically:



Blue represents the quests that are free to access, Red that which must be purchased. Vertical height is how many quests are available, with the horizontal being the various levels (clumped into threes).