The Deathstorm Part 2: Infiltration Add-on for Sniper Elite 4 has 7 achievements.
Infiltration - Complete the Mission
Infiltration - Kill all enemies on the island with explosives
Infiltration - Complete all the Challenges
Infiltration - Kill the Valkyrie Squad reinforcements using only the Neunfaust
Infiltration - Multi-Kill the Officers during the tactical briefing in the auditorium
Infiltration - Eye shot the book burning Officer
Infiltration - Complete the Mission without being shot by a Sniper