Headshots Only

// Add this at the bottom of your mapname.gsc

function new_zombie_mode()
{
    level flag::wait_till( "initial_blackscreen_passed" );
    zombie_utility::set_zombie_var( "zombie_move_speed_multiplier",       0,    true );
    zombie_utility::set_zombie_var( "zombie_move_speed_multiplier_easy",  0,    true );
    level.headshots_only = true;
}

// Add this to your function main
level thread new_zombie_mode();