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
Equip Exotic items in every slot
Reach level 30 with Kruber
Craft 50 items
Complete a level as every Hero
Reach level 30 with Bardin
Salvage 100 items
Unlock all Talent points for 1 career
Reach level 30 with Saltzpyre
Equip an Exotic Item
Complete Skittergate on Veteran
Complete Act 3
Complete Skittergate on Recruit
Complete Act 2
Complete Act 1
Craft an Item
Salvage an item
Equip a Common Item
Equip a Rare Item
Unlock 1st Talent point
Complete Prologue
Complete Skittergate on Champion
Complete Skittergate on Legend
Reach level 30 with Kerillian
Reach level 30 with Sienna
Reach Level 30 with all characters