To perform an attack, press the main attack button on the main screen of the game.

Long pressing main attack button in melee combat activates a melee attack sequence for the equipped melee weapon.

The appearance of the main attack button changes depending on the equipped weapon.

 When using a ranged weapon, pressing the attack button will activate the shot.

On the other side of the screen, there is another main attack button with same function. It is convenient to use it when shooting ranged weapons.

When using a thrown weapon, (such as granades etc) pressing the attack button allows you to aim your item. Release the button to throw.

When using trap, hold the attack button to set a trap. When the trap is set, release the button.

Repeatedly pressing the attack button will help you free yourself if you are grabbed by the enemy.