Steps for usage:
 
1. Drag the files into your game folder
 
2. Open animtrees, select generic_human.atr, and find
body
{
Add after that:
    jnaut_sp_stand_minigun_fire_melee
    jnaut_brutus_death01
    jnaut_brutus_death02
    jnaut_sp_run_minigun
    jnaut_sp_walk_minigun
    jnaut_brutus_spawn_mgun
    jnaut_sp_stand_minigun_fire
    jnaut_sp_walk_minigun_fire
    jugger_minigun_fire
 
3. Enter _zombiemode.gsc and find:
maps\_zombiemode_auto_turret::init();
Add after that:
    maps\_zombiemode_ai_juggernaut::init();
4. Enter _zombiemode_powerups.gsc and find the nuke_powerup( drop_item ) function,
find:
    level thread nuke_flash();
Add after that:
    players = get_players();
    for(i = 0; i< players.size; i++)
    {
        players
EnableInvulnerability();
    }   
find:
        if( zombies
.animname == "boss_zombie" )
        {
            continue;
        }
Add after that:
        if( zombies
.animname == "juggernaut_zombie")
        {
            continue;
        }
find:
    players = get_players();
    for(i = 0; i < players.size; i++)
    {
        players
.score += 400;
        players
.score_total += 400;
        players
maps\_zombiemode_score::set_player_score_hud();
    }
Replace it with:
    players = get_players();
    for(i = 0; i < players.size; i++)
    {
        players
.score += 400* level.zombie_vars["zombie_point_scalar"];
        players
.score_total += 400* level.zombie_vars["zombie_point_scalar"];
        players
maps\_zombiemode_score::set_player_score_hud();
        players
DisableInvulnerability();
    }
Find the check_for_instakill(player) function:
find:
        if( self.animname == "boss_zombie" )
        {
            return;
        }
Add after that:
        if( self.animname == "juggernaut_zombie")
        {
            return;
        }
 
5.Open _zombiemode_tesla.gsc and find the function: tesla_do_damage(source_enemy, arc_num, player):
find:
    if( self.animname == "boss_zombie" )
    {
        if( !isDefined( level.boss_tesla_damage ) )
        {
            level.boss_tesla_damage = 1000;
        }
        self DoDamage( level.boss_tesla_damage, origin, player );
    }
Add after that:
    else if( self.animname == "juggernaut_zombie")
    {
        if( !isDefined( level.boss_tesla_damage ) )
        {
            level.boss_tesla_damage = 5000;
        }
        self DoDamage( level.boss_tesla_damage, origin, player );
    }
 
6.-Add this to your mod.csv
include,ai_zombie_juggernaut