Here is the full list of all 26 Warhammer: Vermintide 2 achievements. It takes around 120-150 hours to unlock all of the achievements on Windows.
Equip a Veteran Item
Complete Prologue
Complete a level as every Hero
Reach level 30 with Sienna
Reach level 30 with Bardin
Equip Exotic items in every slot
Complete Skittergate on Recruit
Complete Skittergate on Veteran
Complete Skittergate on Champion
Reach level 30 with Kruber
Complete Act 2
Unlock all Talent points for 1 career
Complete Act 3
Complete Act 1
Salvage 100 items
Salvage an item
Equip a Rare Item
Equip an Exotic Item
Equip a Common Item
Craft an Item
Craft 50 items
Unlock 1st Talent point
Complete Skittergate on Legend
Reach level 30 with Kerillian
Reach level 30 with Saltzpyre
Reach Level 30 with all characters