#include common_scripts\utility;
#include maps\mp\_utility;
#include maps\mp\zombies\_zm_utility;
#include maps\mp\gametypes_zm\_hud_util;
#include maps\mp\zombies\_zm_weapons;
#include maps\mp\_visionset_mgr;
#include maps\mp\zombies\_zm_audio;
#include maps\mp\zombies\_zm_blockers;
#include maps\mp\zombies\_zm_laststand;
#include maps\mp\zombies\_zm_weapon_locker;
#include maps\mp\zombies\_zm_magicbox;
#include maps\mp\zombies\_zm_perks;
#include maps\mp\zombies\_zm_score;
#include maps\mp\zombies\_zm_stats;
#include maps\mp\zombies\_zm_equipment;
#include maps\mp\zombies\_zm;
#include maps\mp\zombies\_zm_spawner;
#include maps\mp\animscripts\zm_death;
#include maps\mp\zombies\_zm_ai_basic;


main(){
        replaceFunc(maps\mp\zombies\_zm_weap_time_bomb::_time_bomb_restores_player_data_internal, ::_time_bomb_restores_player_data_internal_override);
}

_time_bomb_restores_player_data_internal_override( save_struct )
{
    self endon( "death" );
    self endon( "disconnect" );

    if ( self maps\mp\zombies\_zm_laststand::player_is_in_laststand() )
    {
        debug_time_bomb_print( "TIMEBOMB >> " + self.name + " in last stand, reviving..." );
        self maps\mp\zombies\_zm_laststand::auto_revive( self );
    }
    else if ( isdefined( self.sessionstate ) && self.sessionstate == "spectator" )
    {
        self [[ level.spawnplayer ]]();
        self thread refresh_player_navcard_hud();
    }

    if ( isdefined( self.is_drinking ) && self.is_drinking )
    {
        if ( self has_packapunch_weapon() )
            self.is_drinking++;

        self thread maps\mp\zombies\_zm_perks::perk_abort_drinking( 0.1 );
    }

    if ( self can_time_bomb_restore_data_on_player( save_struct ) )
    {
        debug_time_bomb_print( "TIMEBOMB >> restoring player " + self.name );

        if ( !isdefined( self.time_bomb_save_data ) && !isdefined( save_struct ) )
            self.time_bomb_save_data = spawnstruct();

        if ( !isdefined( save_struct ) )
            s_temp = self.time_bomb_save_data;
        else
            s_temp = save_struct.player_saves[self getentitynumber()];

        self setorigin( s_temp.player_origin );
        self setplayerangles( s_temp.player_angles );
        self setstance( s_temp.player_stance );
        self thread _restore_player_perks_and_weapons( s_temp );
        n_difference_in_score = s_temp.points_current - self.score;


        // Comment here to avoid points duplication
        
        // if ( n_difference_in_score > 0 )
        //     self maps\mp\zombies\_zm_score::add_to_player_score( n_difference_in_score );
        // else
        //     self maps\mp\zombies\_zm_score::minus_to_player_score( abs( n_difference_in_score ) );

        if ( is_weapon_locker_available_in_game() )
        {
            if ( isdefined( s_temp.weapon_locker_data ) )
                self maps\mp\zombies\_zm_weapon_locker::wl_set_stored_weapondata( s_temp.weapon_locker_data );
            else
                self maps\mp\zombies\_zm_weapon_locker::wl_clear_stored_weapondata();
        }

        if ( isdefined( s_temp.account_value ) && isdefined( level.banking_map ) )
        {
            self.account_value = s_temp.account_value;
            self maps\mp\zombies\_zm_stats::set_map_stat( "depositBox", self.account_value, level.banking_map );
        }

        s_temp.save_ready = 1;

        if ( !isdefined( save_struct ) )
            self.time_bomb_save_data = s_temp;

        self ent_flag_wait( "time_bomb_restore_thread_done" );
    }
    else
    {
        debug_time_bomb_print( "TIMEBOMB >> restoring player " + self.name + " FAILED. No matching save detected" );
        self restore_player_to_initial_loadout();
    }

    self _give_revive_points( s_temp );
}

scripts/zm/zm_buried

So basically I create a .gsc like this:

//Place into scripts/zm/zm_buried

init() // entry point
{
    level thread onplayerconnect();
}

onplayerconnect()
{
    for(;;)
    {
        level waittill("connected", player);
        player thread onplayerspawned();
    }
}

onplayerspawned()
{
    self endon("disconnect");
    for(;;)
    {
        self waittill("spawned_player");
    }
}

main()
{
	replaceFunc( maps/mp/zombies/_zm_weap_time_bomb::add_time_bomb_to_mystery_box, ::add_time_bomb_to_mystery_box_override );
}

add_time_bomb_to_mystery_box_override()
{
	return;
}

Compile it, place it into the given dir and it should remove the Timebomb entirely from the chest.

Did I understand correctly, if yes damn you are my saviour !

Put this code in a script in scripts/zm/zm_buried:

main()
{
	replaceFunc( maps/mp/zombies/_zm_weap_time_bomb::add_time_bomb_to_mystery_box, ::add_time_bomb_to_mystery_box_override );
}

add_time_bomb_to_mystery_box_override()
{
	return;
}