There is no overarching progression in Torment of Velious. All the zones are open and while some zones have a few sequential task lines you are free to do the zones in any order you wish.

• Achievement: Mercenary of Eastern Wastes
  
  • Giants with a Big Heart - Reclamation Officer Borminn - hearts
  • Stubborn, Even in Death - Reclamation Officer Borminn - coldain
  • Deafening Quietus - Reclamation Officer Borminn - banshees
• Achievement: Partisan of Eastern Wastes
  
  • The Way Back Home (g) - Missionary Ada - go look
  • The Last of the Storm Boars (g) - Yealdin Felstorm - air
  • You Can't Go Back Home (g) - Grunak - orctooth
• Achievement: Hero of Eastern Wastes
  
  • Griklor the Restless (g) - Bethun Brewbeard - small - ready

• Achievement: Mercenary of Ry`Gorr Mines
  
  • Orcs Everywhere - Roderick Coldheart - orcs
  • Restless Dead - Roderick Coldheart - dead
  • Velium Ore Samples - Milliace Gemshard - safe

• Achievement: Mercenary of Crystal Caverns
  
  • Crystal Geonids - Roderick Coldheart - geonids
  • Crystal Terrors - Roderick Coldheart - terrors
  • Crystal Spiders - Roderick Coldheart - spiders
• Achievement: Partisan of Crystal Caverns
  
  • Invading Ice - Andera Velmist - willing (get this before any other tasks)
  • Supply Run - Cassia Gemshard - supplies
  • Spider Eggs - Andera Velmist - ???
  • Spider Harness - Hursa Brightsteel - capture a spider

• Achievement: Mercenary of Great Divide
  
  • Just Play Dead - Brollo Aleslay - skeletons
  • Cool and Refreshing - Brollo Aleslay - wurms
  • Lake-Effect Snow Devils - Brollo Aleslay - dervishes
• Achievement: Partisan of Great Divide
  
  • Reliks of the Past (g) - Loremaster Dorian - relik
  • Give Us Your Tired - Tobart Dirkins - scout
  • O.M.A.D. (g) - Taskmaster Abyott - creatures
• Achievement: Hero of Great Divide
  
  • Restless Assault (g) - Zrelik the Brave - small - ready

• Achievement: Mercenary of Tower of Frozen Shadow
  
  • Oh, It's You Again! - Emli Widgetton - help
  • This Will Come Back to Haunt Us - Emli Widgetton - study
  • Restless Mess - Emli Widgetton - shards

• Achievement: Mercenary of Velketor's Labytinth
  
  • Restless Orc Syndrome - Radiwol Perpin - orcs
  • Glacial Apophysis - Radiwol Perpin - spiders
  • Invisible Complement - Radiwol Perpin - gargoyles
• Achievement: Hero of Velketor's Labytinth
  
  • Seeking the Sorcerer (g) - Horasug - group - ready

• Achievement: Mercenary of Kael Drakkel
  
  • Citizens Revolting - Derakor the Vindicator - skills
  • Put Soldiers to Rest - Derakor the Vindicator - skills
  • Heroes Must Die (Again) - Derakor the Vindicator - skills
• Achievement: Partisan of Kael Drakkel
  
  • Find the Survivors (g) - Derakor the Vindicator - skills
  • Wolf Bites Giant (g) - Svekk Fangbinder - put him down
  • The Ice Moves (g) - Iceweaver Beldikan - sleeper
• Achievement: Hero of Kael Drakkel
  
  • Icebound Avatar (g) - Iceweaver Sjeon - small - ready