Guide:Progression and Level Locked Content

Level 1
Main Command 26 Icon.png Hunting Logs: Unlocked on completion of level 1 class quest.
Level 5
Main Command 13 Icon.png Mist Access: Unlocked on completion of Where the Heart Is (Mist) Quest.
The Goblet Access: Unlocked on completion of Where the Heart Is (The Goblet) Quest.
Level 10
Main Command 21 Icon.png Armoury System:
Class change unlocked on completion of first level 10 class quest.
Levequest1 Icon.png Levequests:
Unlocked after Main Story Quest (level 9) and on completion of Leves of Bentbranch, Leves of Horizon or Leves of Swiftperch.
Guildhesticon.png Guildhests: Unlocked on completion of Simply the Hest (Limsa Lominsa), Simply the Hest (Ul'dah) or Simply the Hest (Gridania).
Duty roulette icon.png Duty Roulette: Guildhests:
Unlocked on completion of the first Guildhest: Basic Training: Enemy Parties.
Main Command 13 Icon.png Lavender Beds Access: Unlocked on completion of Where the Heart Is (Lavender Beds) Quest.
Level 14
Step Dance Icon.png Step Dance Emote:
Unlocked on completion of Good for What Ales You sidequest in Limsa Lominsa.
Ball Dance Icon.png Ball Dance Emote:
Unlocked on completion of Help Me, Lord of the Dance sidequest in Ul'Dah.
Harvest Dance Icon.png Harvest Dance Emote:
Unlocked on completion of Saw That One Coming sidequest in Gridania.
Level 15
Main Command 61 Icon.png Gold Saucer Access:
Unlocked during It Could Happen to You sidequest.
Dungeon Icon.png Sastasha Dungeon Access:
Unlocked during It's Probably Pirates Main Storyline Quest.
Challengeicon.png Challenge Log:
Unlocked upon completion of the Rising to the Challenge sidequest. Available after completing Call of the Sea Main Quest.
Dye Icon.png Dye System: Unlocked upon completion of Color Your World sidequest. Expanded to relic armor upon completion of Simply to Dye For sidequest.
Main Command 3 Icon.png Aesthetician System:
Unlocked upon completion Beauty Is Only Scalp Deep sidequest. Available after completing Call of the Sea Main Quest.
Wind-up Airship (Minion) Icon.png Airship Travel:
Unlocked upon completion The Gridanian Envoy, The Lominsan Envoy, The Ul'dahn Envoy Main Storyline Quest.
Main Command 14 Icon.png Party Finder System:
Unlocked after completing Sastasha (note: this does not automatically become available at level 15 like many guides indicate).
Coeurl Kitten (Minion) Icon.png Coeurl Kitten (Minion):
Unlocked on completion of Curiosity Killed the Coeurl sidequest.
Wolf Pup (Minion) Icon.png Wolf Pup (Minion):
Unlocked on completion of Man's Best Fiend sidequest.
HotNicon.png Hall of the Novice:
Unlocked on completion of It's Probably Pirates Main Storyline Quest or by talking to a Smith NPC located at the Adventurers' Guild in each city.
Level 16
Dungeon Icon.png The Tam-Tara Deepcroft Dungeon Access:
Unlocked during Fire in the Gloom Main Storyline Quest at level 16.
Duty roulette icon.png Duty Roulette: Leveling:
Unlocked when more than one dungeon is unlocked.
Level 17
Dungeon Icon.png Copperbell Mines Dungeon Access:
Unlocked during Into a Copper Hell Main Storyline Quest.
Main Command 2 Icon.png Retainer Access:
Unlocked upon completion of the The Scions of the Seventh Dawn Main Storyline Quest.
Main Command 2 Icon.png Retainer Ventures: Unlocked upon completion An Ill-conceived Venture (Limsa Lominsa), An Ill-conceived Venture (Gridania), or An Ill-conceived Venture (Ul'dah) sidequest.
Flawless Band Icon.png Ceremony of Eternal Bonding:
Completed via The Ties that Bind Special Quest.
PotDItem.png Palace of the Dead:
Completed via The House That Death Built sidequest.
Level 19
Materia Assimilating Icon.png Ability to convert gear into Materia:
Unlocked upon completion of the Forging the Spirit sidequest.
Materia Melding Icon.png Ability to meld Materia onto gear:
Unlocked upon completion of the Waking the Spirit sidequest.
Level 20
Grand Company Icon.png Grand Company Selection:
Unlocked upon completion of the "The Company You Keep" quest (Immortal Flames, Maelstrom, Twin Adder).
Company Chocobo Mount Icon.png Chocobo Mount Access:
Unlocked upon completion of the "My Little Chocobo" quest (Immortal Flames, Maelstrom, Twin Adder).
Sightseeing icon.png Sightseeing Log:
Unlocked upon completion of the A Sight to Behold sidequest.
Dungeon Icon.png Halatali Dungeon Access:
Unlocked during Hallo Halatali Sidequest.
Trialicon.png The Bowl of Embers (Trial) Trial Access:
Unlocked during Lord of the Inferno Main Storyline Quest.
Level 22
Chigoe Larva (Minion) Icon.png Chigoe Larva (Minion):
Unlocked on completion of Occupational Hazards sidequest.
Company Chocobo Mount Icon.png Mount Speed increase to all lower level areas: middle La Noscea, lower La Noscea, Central Shroud, East Shroud, western Thanalan, central Thanalan; unlocked after Brotherly Love Main Storyline Quest.
Level 24
Dungeon Icon.png The Thousand Maws of Toto-Rak Dungeon Access:
Unlocked during Into the Beast's Maw Main Storyline Quest.
Level 25
Advanced Materia Melding Icon.png Advanced Materia melding:
Unlocked upon completion of the Melding Materia Muchly sidequest.
Level 28
Dungeon Icon.png Haukke Manor Dungeon Access:
Unlocked during Skeletons in Her Closet Main Storyline Quest.
Level 29
Zoneicon.png White Wolf Gate Access:
Unlocked on completion of Broadening Horizons sidequest.
Level 30
Main Command 1 Icon.png Job Specialization:
Unlocked on completion of level 30 class quests.
Main Command 22 Icon.png Chocobo Companion Access: Unlocked upon completion of the My Feisty Little Chocobo sidequest. Extended to chocobo raising upon completion of the Bird in Hand sidequest.
Desynthesis Icon.png Desynthesis:
Unlocked upon completion of the Gone to Pieces sidequest.
Level 32
Dungeon Icon.png Brayflox's Longstop Dungeon Access:
Unlocked during The Things We Do for Cheese Main Storyline Quest.
Level 33
Goobbue Sproutling (Minion) Icon.png Goobbue Sproutling (Minion):
Unlocked on completion of It Was a Very Good Year Main Scenario Quest.
Company Chocobo Mount Icon.png Mount speed increased in eastern La Noscea after completion of In the Company of Heroes Main Story Quest
Company Chocobo Mount Icon.png Mount speed increased in upper and outer La Noscea after completion of Lord of Crags Main Story Quest
Level 34
Trialicon.png The Navel (Trial) Trial Access:
Unlocked during Lord of Crags Main Storyline Quest.
Level 35
Dungeon Icon.png The Sunken Temple of Qarn Dungeon Access:
Unlocked during Braving New Depths Sidequest.
Level 36
Main Command 21 Icon.png Treasure Hunting:
Unlocked upon completion of the Treasures and Tribulations sidequest.
Throw Emote Icon.png Throw Emote:
Unlocked on completion of Toss Fit Workout sidequest.
Level 38
Dungeon Icon.png Cutter's Cry Dungeon Access:
Unlocked during Dishonor Before Death Sidequest.
Level 41
Dungeon Icon.png The Stone Vigil Dungeon Access:
Unlocked during In Pursuit of the Past Main Storyline Quest.
Wind-up Kobold (Minion) Icon.png Kobold Quests:
Unlocked starting with Highway Robbery sidequest.
Wind-up Ixal (Minion) Icon.png Ixal Quests:
Unlocked starting with A Bad Bladder sidequest.
Level 42
Wind-up Sylph (Minion) Icon.png Sylph Quests:
Unlocked starting with Seeking Solace sidequest.
Main Command 10 Icon.png The Isles of Umbra Access:
Unlocked during the The Reluctant Researcher Main Scenario Quest.
Level 43
Wind-up Amalj'aa (Minion) Icon.png Amalj'aa Quests:
Unlocked starting with Peace for Thanalan sidequest.
Level 44
Dungeon Icon.png The Dzemael Darkhold Dungeon Access:
Unlocked during Fort of Fear or "Shadows Uncast" quest (Immortal Flames, Maelstrom, Twin Adder).
Trialicon.png The Howling Eye (Trial) Trial Access:
Unlocked during Lady of the Vortex Main Storyline Quest.
Wind-up Sahagin (Minion) Icon.png Sahagin Quests:
Unlocked starting with They Came from the Deep sidequest.
Level 47
Dungeon Icon.png The Aurum Vale Dungeon Access:
Unlocked during Going for Gold Sidequest.
Cactuar Cutting (Minion) Icon.png Cactuar Cutting (Minion):
Unlocked on completion of Zombies Are People Too sidequest.
SquadPriorityicon.png Adventurer Squadrons:
Unlocked on completion of one of the Squadron and Commander Grand Company quests.
Level 49
Trialicon.png Cape Westwind (Trial) Trial Access:
Unlocked during Operation Archon Main Storyline Quest.
Level 50 (Recommended iLevel ~45 to ~55)
Main Command 4 Icon.png PvP Access:
Unlocked upon completion of the "A Pup No Longer" quest (Immortal Flames, Maelstrom, Twin Adder).
Hunticon.png The Hunt:
Unlocked upon completion of the applicable Let the Hunt Begin sidequest.
Cast Glamour Icon.png Glamours:
Unlocked upon completion of A Self-improving Man sidequest.
Dungeon Icon.png Castrum Meridianum Dungeon Access:
Unlocked during Rock the Castrum Main Storyline Quest.
Dungeon Icon.png The Praetorium Dungeon Access:
Unlocked during The Ultimate Weapon Main Storyline Quest.
Duty roulette icon.png Duty Roulette: Main Scenario:
Unlocked on completion of The Praetorium.
Dungeon Icon.png Amdapor Keep Dungeon Access:
Unlocked during Ghosts of Amdapor.
Dungeon Icon.png The Wanderer's Palace Dungeon Access:
Unlocked during Trauma Queen Sidequest.
Manderville Dance Icon.png Hildibrand Quests and Manderville Dance Emote: The Quests start with The Rise and Fall of Gentlemen. The emote is obtained from The Hammer and access to Parley is obtained from A Case of Indecency.
Mini Mole (Minion) Icon.png Delivery Moogle Quests and Mini Mole minion:
The Quests start with Of Errant Epistles and the minion is obtained from Thwack-a-Mole.
Sable Death Mask Icon.png Allied Beast Tribe Quests:
The Quests start with Call of the Wild.
Gae Bolg Icon.png Relic Weapon Path:
Unlocked starting with The Weaponsmith of Legend sidequest.
Level 50 (Recommended iLevel ~55 to ~65)
Dungeon Icon.png Pharos Sirius Dungeon Access:
Unlocked during Sirius Business sidequest.
Dungeon Icon.png Copperbell Mines (Hard) Dungeon Access:
Unlocked during Out of Sight, Out of Mine Sidequest.
Dungeon Icon.png Haukke Manor (Hard) Dungeon Access:
Unlocked during Maniac Manor Sidequest.
Trialicon.png The Bowl of Embers (Hard) Trial Access:
Unlocked during Ifrit Bleeds, We Can Kill It Chronicles of a New Era Quest.
Trialicon.png A Relic Reborn: The Chimera Trial Access:
Unlocked during one of the A Relic Reborn Sidequests.
Trialicon.png A Relic Reborn: The Hydra Trial Access:
Unlocked during one of the A Relic Reborn Sidequests.
Trialicon.png Thornmarch (Hard) Trial Access:
Unlocked during the You Have Selected Regicide Main Scenario Quest.
Trialicon.png The Whorleater (Hard) Trial Access:
Unlocked during the Lord of the Whorl Main Scenario Quest.
Trialicon.png Battle on the Big Bridge Trial Access:
Unlocked during the The Three Collectors Hildibrand Quest.
Trialicon.png The Striking Tree (Hard) Trial Access:
Unlocked during the Levin an Impression Main Scenario Quest.
Level 50 (Recommended iLevel ~65 to ~75)
Trialicon.png The Howling Eye (Hard) Trial Access:
Unlocked during In for Garuda Awakening Chronicles of a New Era Quest.
Trialicon.png The Navel (Hard) Trial Access:
Unlocked during In a Titan Spot Chronicles of a New Era Quest.
Dungeon Icon.png Brayflox's Longstop (Hard) Dungeon Access:
Unlocked during Curds and Slay Sidequest.
Dungeon Icon.png Halatali (Hard) Dungeon Access:
Unlocked during This Time's for Fun Sidequest.
Dungeon Icon.png The Lost City of Amdapor Dungeon Access:
Unlocked during One Night in Amdapor Sidequest.
Raidicon.png Labyrinth of the Ancients Access:
Unlocked during Labyrinth of the Ancients (Quest) sidequest.
Level 50 (Recommended iLevel ~75 to ~85)
Raidicon.png The Binding Coil of Bahamut Access:
Unlocked during Primal Awakening Chronicles of a New Era.
Raidicon.png Syrcus Tower Access:
Unlocked during Syrcus Tower (Quest) quest.
Trialicon.png The Minstrel's Ballad: Ultima's Bane Trial Access:
Unlocked during the The Ultimate Ballad sidequest.
Trialicon.png The Howling Eye (Extreme) Trial Access:
Unlocked during the Gale-force Warning Chronicles of a New Era quest.
Trialicon.png The Navel (Extreme) Trial Access:
Unlocked during the Quake Me Up Before You O'Ghomoro Chronicles of a New Era quest.
Trialicon.png The Bowl of Embers (Extreme) Trial Access:
Unlocked during the Ifrit Ain't Broke Chronicles of a New Era quest.
Dungeon Icon.png Hullbreaker Isle Dungeon Access:
Unlocked during King of the Hull Sidequest.
Dungeon Icon.png The Tam-Tara Deepcroft (Hard) Dungeon Access:
Unlocked during Corpse Groom Sidequest.
Dungeon Icon.png The Stone Vigil (Hard) Dungeon Access:
Unlocked during Blood for Stone Sidequest.
Main Command 4 Icon.png Frontline Access: Unlocked upon completion of the "Like Civilized Men and Women " quest (Immortal Flames, Maelstrom, Twin Adder).
Level 50 (Recommended iLevel ~85 to ~95)
Dungeon Icon.png Sastasha (Hard) Dungeon Access:
Unlocked during It's Definitely Pirates.
Dungeon Icon.png The Sunken Temple of Qarn (Hard) Dungeon Access:
Unlocked during The Wrath of Qarn.
Dungeon Icon.png Snowcloak Dungeon Access:
Unlocked during The Path of the Righteous Main Storyline Quest.
Duty roulette icon.png Duty Roulette: Level 50 Dungeons:
Unlocked on completion of all level 50 dungeons.
Raidicon.png The Second Coil of Bahamut Access:
Unlocked during Another Turn in the Coil Chronicles of a New Era.
Trialicon.png Thornmarch (Extreme) Trial Access:
Unlocked during the The King Lives sidequest.
Trialicon.png The Whorleater (Extreme) Trial Access:
Unlocked during the Whorl of a Time sidequest.
Trialicon.png Akh Afah Amphitheatre (Hard) Trial Access:
Unlocked during the The Instruments of Our Deliverance‎ Main Storyline Quest.
Trialicon.png Battle in the Big Keep Trial Access:
Unlocked during the Her Last Vow Hildibrand Quest.
Duty roulette icon.png Duty Roulette: Trials: Unlocked on completion of two or more trials in roulette.
Level 50 (Recommended iLevel ~95 to ~105)
Trialicon.png The Chrysalis Access:
Unlocked during the An Uninvited Ascian Main Storyline Quest.
Trialicon.png The Steps of Faith Trial Access:
Unlocked during An Allied Perspective Main Storyline Quest.
Raidicon.png The World of Darkness Access:
Unlocked during The World of Darkness (Quest) quest.
Dungeon Icon.png Amdapor Keep (Hard) Dungeon Access:
Unlocked during For Keep's Sake.
Dungeon Icon.png The Wanderer's Palace (Hard) Dungeon Access:
Unlocked during Not Easy Being Green.
Dungeon Icon.png The Keeper of the Lake Dungeon Access:
Unlocked during Best Laid Schemes Main Storyline Quest.
Trialicon.png Urth's Fount (Trial) Access:
Unlocked during the Fear and Odin in the Shroud sidequest.
Trialicon.png The Striking Tree (Extreme) Trial Access:
Unlocked during the Judgment Bolts and Lightning sidequest.
Trialicon.png Akh Afah Amphitheatre (Extreme) Trial Access:
Unlocked during the Drop Dead Shiva sidequest.
Level 50 (Recommended iLevel ~110+)
Raidicon.png The Final Coil of Bahamut Access:
Unlocked during Fragments of Truth Chronicles of a New Era.
Raidicon.png Second Coil of Bahamut (Savage) Access:
Unlocked during Sing Me Another Song Chronicles of a New Era quest.

[1] [2] [3]

References
  1. http://i.imgur.com/W4OaUx3.png
  2. http://katella.wordpress.com/2013/12/16/unlocking-2-1-content-where-to-start/
  3. http://katella.wordpress.com/2014/03/21/unlocking-2-2-content-where-to-start/