Rangers have the Infiltrate, Move through Cover, and Stealth special rules.
This special rule is automatically lost by an independent character joining a unit that does not have this special rule, and vice versa. There are many variants of this rule: Fleet of Foot, Fleet of Claw, even Fleet of Hoof. Title aside, all models with these abilities are treated similarly. In a turn in which models with this rule do not shoot or use a psychic power that replaces shooting, they can move an additional D6" in the Shooting phase, ignoring penalties for difficult terrain.
Some units of infantry are especially adept at moving through difficult terrain. Accordingly, roll an extra D6 when rolling to move through difficult terrain. In most circumstances this will mean that they roll 3D6 and pick the dice with the highest score.
The ability to make maximum use of available cover has saved many a warrior from discovery and death. The unit's Cover Save is improved by +1 if they are in cover.
This special rule is automatically lost by an independent character joining a unit that does not have this special rule, and vice versa. In the right circumstances, stealthy troops have the ability to work their way into a forward position on the battlefield. To represent this, units with the Infiltrate ability may set up in accordance with the Infiltrate special rule in any mission that uses this special rule. If the mission does not allow troops to use the Infiltrate rule then the troops in question must set up normally with the rest of the army. The Infiltrate ability does not allow units that would normally be in reserve to deploy on the table. If a unit with this ability is equipped with a transport vehicle, it loses the Infiltrate ability. Any infiltrators deployed on the table at the start of the game are deployed after all other units. If both sides have infiltrators, toss a coin to determine who goes first and alternate deploying these units. Infiltrators may be set up anywhere on the table that is more than 12" away from an enemy unit, if no deployed enemy unit can draw a line of sight to them. Alternatively, they may be set up anywhere on the table that is more than 18" from an enemy unit, even if they can be seen.
