Can be enabled or disabled in the options, entirely disabled at the 'Black Metal' difficulty. Most weapons now use a reload mechanism.Hell knights, barons of Hell and heavy weapon dudes can be kicked in the nuts, causing them to enter a longer pain state, but attack much more aggressively afterwards.
In addition, the player can also slide kick and air kick by crouching and moving forward while kicking, jumping while moving forward while kicking, respectively.
Can be enabled or disabled in the options.