Counter is Syndicate's basic defensive move, available from the opening sequence. Watch for incoming strikes and counter them instead of trading blows.
Counter sits at position 3 of 18 in the Combat tree. Counter costs no skill points. The twins learn it during Sequence 1. Jacob and Evie each have their own skill tree, so you buy Counter once for each twin.
Adrenaline
Raises how fast your health regenerates.
Combat Stamina
Multi-Kills restore health, more for each enemy killed.
Counter Boost
Counters get a wider timing window and deal more damage.
Execute I
Stun an enemy with Stun Attack, then use a Tool Combo on him to execute him outright.