The Back And Kicking Brass Title update for Killing Floor 2 has 13 achievements.
Complete Steam Fortress on Objective Normal Difficulty
Complete Steam Fortress on Objective Hard Difficulty
Complete Steam Fortress on Objective Suicidal Difficulty
Complete Steam Fortress on Objective Hell On Earth Difficulty
Destroy 10 Steam Batteries on Steam Fortress
Complete Zed Landing on Objective Normal Difficulty
Complete Zed Landing on Objective Hard Difficulty
Complete Zed Landing on Objective Suicidal Difficulty
Complete Zed Landing on Objective Hell On Earth Difficulty
Complete Outpost on Objective Normal Difficulty
Complete Outpost on Objective Hard Difficulty
Complete Outpost on Objective Suicidal Difficulty
Complete Outpost on Objective Hell On Earth Difficulty