Perception:

Penetration: A skill in which the user may fire a bullet, which in turns degrades the AP value of your enemies armour by 3. This skill is exclusive to Rifles.
+1 round to fire. Uses 25 stamina

Strength:

Mighty strike: This skill allows the user to either use the butt of a gun, a blunt weapon or the hilt of a blade to strike your opponent into a daze, stunning them for one round.
Roll a d6, 1 and a 6 for a hit. Does 5 blunt damage. Uses 15 stamina. Minor stun.

Dexterity:

Speed time: This melee weapon skill allows the user to gain a rush of adrenaline, which in turn seemingly slows down time for the user, allowing him/her to get in two more attacks.
Uses 20 stamina. Lasts 1 round.