Official screenshot from Ubisoft.
Furious is for destroying twenty vehicles by ramming them with your own carriage.
Pick a heavy carriage and ram enemy carriages during chases until they break.
Are you scared yet?
Frighten 200 enemies.
Blade from Above
Air Assassinate twenty enemies from a zipline.
Blade in the Crowd
Assassinate fifty enemies.
Brutal
Perform 30 complete Brutal Takedowns.