Stealth is the ability to Hide in the Shadows can become effectively invisible to opponents; stealth is a game mechanic that began in Dungeons and Dragons and is now almost universal in MMO's. Stealth is almost synonymous with Critical Strike high-damage, one-shot abilities; in Baldur's Gate this is true of the Thief class, but not of the Ranger or Bard.

Becoming stealthed relies a lot on Line of Sight to the opponent; if the opponent can see you, you cannot suddenly disappear, is the logic. In practical terms this means hiding, becoming stealthed, and remaining hidden. Remaining hidden depends on the relative levels of the enemy and the stealther, the level of the hide in shadows ability, and the proximity of the stealther to the enemy.

Items which boost stealth: