dead eye
with dead eye, Arthur can Target his rival, and hit it with bullet/arrow/knife/axe, Dead Eye has a bar, which is filled by fighting, landing accurate shots, taking damage, or drinking snake oil.
in the gameplay omni-man fly in super speed, which make him a blur, but with dead eye Arthur can shoot him before omni-man can be behind his back
In another gameplay, Omni-Man will also attack Arthur at super speed, but Arthur marks his targets with Dead Eye and shoots without missing each one of them.
tonics
Tonics can be used to heal health and fill the dead eye bar.
they can also be made in combat, but with the risk at being open at attacks
horse
the horse can also help, the horse can charge to the opponent and make them fall to the ground, the horse also can take some damage for you but that will scare them out of the fight for some time, at last with the horse you can change any your weapon with the risk of being open at attacks
parry/block
if you push the block button at the right time, close to mid range attacks can be parry, Arthur with his forearm will stop the attacks and hit back for a opening or combo
dodge
if you keep pushing the block button, and use the directional movement, you can dodge close attacks to long range attacks, in close range you can counter and start a combo
ammo and such
Arthur can use all types of ammo, bullets, arrows, coctel Molotov, dinamite, knife, axes and the rope, the can also be created when they run out.