Here is a walkthrough of all the campaign levels completed on veteran difficulty:
Hammerhold:Sandhawk Hamlet:Sape Oasis:Dunes of Despair:Buccaneer's Den:Nazeru's Gates:Crimson Valley:Snapvine Bridge:Lost Jungle:Ma'qwa Urqu:Temple of Saqra:The Underpass:Beresad's Lair:The Dark Descent:Emberspike Depths:Port Tortuga:Storm Atoll:The Sunken Citadel:Darklight Depths:Bonesburg:Desecrated Grove:Dusk Chateau: