Loner

Loner is a Fallout Tactics Perk. So far it hasn't appeared in any other game.
 * Requirements: Level 4, Outdoorsman 40%, CH < 5
 * Ranks: 1
 * Benefit: Your solitary childhood and upbringing mean that you work much better when alone. Get +10% to all rolls when outside the influence of other squad members.
 * Notes: This bonus seems to be always active, no matter if there's a squad member close by or not.