The Execution Force Add-on for Warhammer 40,000: Chaos Gate - Daemonhunters has 9 achievements.
Acquire all Assassins at once
Promote a Callidus Assassin to Rank 9
Promote a Culexus Assassin to Rank 9
Promote an Eversor Assassin to Rank 9
Promote a Vindicare Assassin to Rank 9
Destroy a Tentarus Hive
Board and destroy a Death Guard Cruiser
Execute 10 Tainted Sons Enemies
Kill an enemy with Bio-Meltdown