Units that contain at least one model with this special rule are deployed last, after all other units (friend and foe) have been deployed. If both sides have Infiltrators, the players roll-off and the winner decides who goes first, then alternate deploying these units. Infiltrators can be set up anywhere on the table that is more than 12" from any enemy unit, as long as no deployed enemy unit can draw line of sight to them. This includes in a building, as long as the building is more than 12" from any enemy unit. Alternatively, they can be set up anywhere on the table more than 18" from any enemy unit, even in plain sight. If a unit with Infiltrate deploys inside a Dedicated Transport, they may Infiltrate along with their Transport. A unit that deploys using these rules cannot charge in their first turn. Having Infiltrate also confers the Outflank special rule to units of Infiltrators that are kept as Reserves. If a unit has both the Infiltrate and Scout special rule, that unit can deploy as per the Infiltrate special rule and then redeploy as per the Scout special rule.
If a model with this special rule rolls a 6 To Hit with a shooting weapon, that shot is a 'Precision Shot'. Wounds from Precision Shots are allocated against a model (or models) of your choice in the target unit, as long as it is in range and line of sight of the firer, rather than following the normal rules for Wound allocation. A character that has a Precision Shot Wound allocated to it can still make a Look Out, Sir roll. Note that Snap Shots and shots from weapons that scatter, or do not roll To Hit, can never be Precision Shots.
A unit that contains at least one model with this special rule counts its cover saves as being 1 point better than normal. Note that this means that a model with the Stealth special rule always has a cover save of at least 6+, even if it is in the open. This rule is often presented as Stealth (X) where X indicates a specific type of terrain, such as Stealth (Woods) or Stealth (Ruins). If this is the case, the unit only gains the benefit whilst it is in terrain of the specified type. Cover save bonuses from the Shrouded and Stealth special rules are cumulative (to amaximum of a 2+ cover save).
A unit that contains at least one model with this special rule counts its cover save as being 2 points better than normal. Note that this means a model with the Shrouded special rule always has a cover save of at least 5+, even if it's in the open. Cover save bonuses from the Shrouded and Stealth special rules are cumulative (to a maximum of a 2+ cover save).
A unit consisting entirely of models with this special rule (not counting Drones) benefits from Heroic Morale, even if they are not accompanied by an Independent Character.
When an enemy unit declares a charge, all friendly models with this special rule in units within 6" of the charging unit's target can choose to fire Overwatch as if they were also targets of the charge. Note that a unit can still only fire Overwatch once each phase.