INFILTRATOR

In the Warhammer 40,000 universe, an Infiltrator primarily refers to Vanguard Space Marine Infiltrators—specialized Primaris battleline units clad in Mark X Phobos Power Armour who excel at stealth, sabotage, and communications disruption. The title also applies to the Adeptus Mechanicus Sicarian Infiltrators, cybernetic shock troops designed to paralyze enemy senses. Operating deep behind enemy lines, Space Marine Infiltrators use specialized wargear like Omni-Scramblers and marksman bolt carbines to dominate combat zones.