Shooting:

Called shot: -50

Target not noticing: +50

Target immobile: +100

Target already hit once: +20

Just dodged: -20

Evasive maneuvers: -50

Search:

Tracks per day old: -20

Per person over 1: +10

Vehicle: +50

Bad weather: -50

Dark: -50

Sneak:

Bulky equipment: -50

Dark: +25

Light: -10

Floor texture: -10/+10

Area: +10/-10

Driving/Piloting/Mecha piloting:

Flank speed: -20

180 or big turn: -30

Tough maneuver: -50

Genetics/Adapting/Cybernetics/Physician:

Location: +20/-20

Seriousness: +50/-50

Learning/Linguistics:

Easy: +50

Difficult: -50

Navigation:

Short/long course: +50/-50

Obstacles: -25

Tactics:

Outnumbered: -50

More: +50

Terrain: +50/-50

Athletics:

Difficult: -50

Easy: +50

Weighed down: -50

Deceit skills:

Difficult: -50

Easy: +50

Bulky equipment: -20

Tech skills:

Difficult: -50

Easy: +50

Rare: -50

Light damage: +50

Heavy damage: -50