Sneak (Fallout)

Sneak is a skill in Fallout, Fallout 2 and Fallout Tactics. It determines the chance of being detected while sneaking.

Background
Sneak only covers sneaking as such, while pickpocketing is covered by the Steal skill. In Fallout and Fallout 2, one cannot run and sneak at the same time without the Silent Running perk.

Initial level
Fallout: \text{Initial level}\%=25+\text{Agility}

Fallout 2 and Fallout Tactics: \text{Initial level}\%=5+\text{Agility}\times3

Fallout and Fallout 2

 * Target's Perception statistic.
 * Sneaking character's Sneak skill.
 * The facing of the target.

Target facing has a direct impact on how close a player character can be before the target begins to check if they can see a sneaking player (Sneak Checks). The player can sneak up to 3/5's closer to the target from behind before facing Sneak Checks against the target's perception and sneak skill.

Fallout Tactics

 * Target's Perception statistic.
 * Sneaking character's Sneak skill.
 * Sneaking character's stance plays a much smaller role than the above two factors
 * The light level from the day/night cycle plays a small factor too, but again a much smaller one than the Perception statistic and the Sneak skill.
 * Facing of the target does not impact Sneak.