So I was playing some zombies with a friend and wanted to do something with gsc. Just to remember the good old golden days. Thought of making a custom powerup and unlimited ammo seemed like a pretty cool one.

So it'll drop on the ground randomly just like any powerup, and when someone picks it up, every player gets unlimited ammo for 30secs. Duration can be easily changed, of course.

This is not intended for Turned or Grief. I have no idea what happens if you try to use them there. Nothing good I'd assume.
Cba'd to make it work with them because who needs unlimited ammo in Turned, and who tf plays Grief.
Other than that, should be all good. Managed to even spam myself with the powerup over 2000 times in a row with no issues.

EDIT: Seems the shader I'm using for the icon wont load in all maps KMS KMS KMS KMS KMS KMS. I fucking cba trying to find one that works. Shit's fucking impossible. I can deal with a checkerboard icon in some maps.

Video
https://www.youtube.com/watch?v=M5qXeJAmdZ8
Picture
https://i.imgur.com/Amllzkw.jpg

Full source for a minimal example script. Be sure to read the comments in there if you'll be doing any changes yourself.

#include maps\mp\_utility;
#include common_scripts\utility;
#include maps\mp\gametypes_zm\_hud_util;
#include maps\mp\gametypes_zm\_hud_message;

//important include
#include maps\mp\zombies\_zm_powerups;

init()
{
   	level thread onPlayerConnect();

	//include and init the powerup
   	include_zombie_powerup("unlimited_ammo");
   	//change the powerup duration if you want
   	level.unlimited_ammo_duration = 30;
   	//shitty model, cant find a good model list so cba
   	//change to w/e if you have some nice model
   	//galil works in all maps though, so be decent in that regard ig
   	add_zombie_powerup("unlimited_ammo", "T6_WPN_AR_GALIL_WORLD", &"ZOMBIE_POWERUP_UNLIMITED_AMMO", ::func_should_always_drop, 0, 0, 0);
	powerup_set_can_pick_up_in_last_stand("unlimited_ammo", 1);
}

onPlayerConnect()
{
    for(;;)
    {
        level waittill("connected", player);
        player thread onPlayerSpawned();
    }
}

onPlayerSpawned()
{
    self endon("disconnect");
	level endon("game_ended");
    for(;;)
    {
        self waittill("spawned_player");
        if(self isHost() && !isDefined(level.unlimited_ammo_first_spawn))
        {
        	wait 2;
        	//store the original custom powerup grab function, 
        	//if one exists (Origins, Buried, Grief & Turned)
        	//note that this is not intended for Grief or Turned
        	//I have no idea what will happen, probably pretty broken
        	if(isDefined(level._zombiemode_powerup_grab))
        		level.original_zombiemode_powerup_grab = level._zombiemode_powerup_grab;
        		
        	//delayed defining of the custom function so we're sure to
        	//override the function Origins and Buried defines for this
        	level._zombiemode_powerup_grab = ::custom_powerup_grab;
        	
        	//message for the host to indicate that it should be all good
        	wait 2;
		self iprintlnbold("^7Unlimited Ammo Custom Powerup Loaded!");
        	
        	//gives host the ability to test the powerup at the start of the game
        	//can be used to make sure it's actually working and all good
        	//remove the line directly below to disable
        	self thread test_the_powerup();
        	
        	//whatever so this variable isn't undefined anymore
        	level.unlimited_ammo_first_spawn = "fortnite!fortnite!!";
        }
    }
}

test_the_powerup()
{
	self endon("death");
	self endon("disconnected");
	self endon("testing_chance_ended");
	level endon("game_ended");
	wait 3;
	self iprintlnbold("^7Press ^1[{+smoke}] ^7to test, you have ^15 seconds^7.");
	self thread testing_duration_timeout();
	for(;;)
	{
		if(self secondaryoffhandbuttonpressed())
		{
			level specific_powerup_drop("unlimited_ammo", self.origin + VectorScale(AnglesToForward(self.angles), 70));
			return;
		}
		wait .05;
	}
}

testing_duration_timeout()
{
	self endon("death");
	self endon("disconnected");
	wait 5;
	self notify("testing_chance_ended");
}

//fires when we grab any custom powerup
custom_powerup_grab(s_powerup, e_player)
{
	if (s_powerup.powerup_name == "unlimited_ammo")
		level thread unlimited_ammo_powerup();
	
	//pass args onto the original custom powerup grab function
	else if (isDefined(level.original_zombiemode_powerup_grab))
		level thread [[level.original_zombiemode_powerup_grab]](s_powerup, e_player);
}

unlimited_ammo_powerup()
{
	foreach(player in level.players)
	{
		//if powerup is already on, turn it off
		player notify("end_unlimited_ammo");
		//small cha ching sound for each player when someone picks up the powerup
		//cba'd to come up with anything better and don't have a list of sounds, 
		//change to w/e if you want.
		player playsound("zmb_cha_ching");
		player thread turn_on_unlimited_ammo();
		player thread unlimited_ammo_on_hud();
		player thread notify_unlimited_ammo_end();
	}
}

unlimited_ammo_on_hud()
{
	self endon("disconnect");
	//hud elems for text & icon
	unlimited_ammo_hud_string = newclienthudelem(self);
	unlimited_ammo_hud_string.elemtype = "font";
	unlimited_ammo_hud_string.font = "objective";
	unlimited_ammo_hud_string.fontscale = 2;
	unlimited_ammo_hud_string.x = 0;
	unlimited_ammo_hud_string.y = 0;
	unlimited_ammo_hud_string.width = 0;
	unlimited_ammo_hud_string.height = int( level.fontheight * 2 );
	unlimited_ammo_hud_string.xoffset = 0;
	unlimited_ammo_hud_string.yoffset = 0;
	unlimited_ammo_hud_string.children = [];
	unlimited_ammo_hud_string setparent(level.uiparent);
	unlimited_ammo_hud_string.hidden = 0;
	unlimited_ammo_hud_string maps/mp/gametypes_zm/_hud_util::setpoint("TOP", undefined, 0, level.zombie_vars["zombie_timer_offset"] - (level.zombie_vars["zombie_timer_offset_interval"] * 2));
	unlimited_ammo_hud_string.sort = .5;
	unlimited_ammo_hud_string.alpha = 0;
	unlimited_ammo_hud_string fadeovertime(.5);
	unlimited_ammo_hud_string.alpha = 1;
	//cool powerup name, sounds like something that could actually be in the game
	//credits to "Banni" for it
	unlimited_ammo_hud_string setText("Bottomless Clip!");
	unlimited_ammo_hud_string thread unlimited_ammo_hud_string_move();
	
	unlimited_ammo_hud_icon = newclienthudelem(self);
	unlimited_ammo_hud_icon.horzalign = "center";
	unlimited_ammo_hud_icon.vertalign = "bottom";
	unlimited_ammo_hud_icon.x = -75;
	unlimited_ammo_hud_icon.y = 0;
	unlimited_ammo_hud_icon.alpha = 1;
	unlimited_ammo_hud_icon.hidewheninmenu = true;   
	unlimited_ammo_hud_icon setshader("hud_icon_minigun", 40, 40);
	self thread unlimited_ammo_hud_icon_blink(unlimited_ammo_hud_icon);
	self thread destroy_unlimited_ammo_icon_hud(unlimited_ammo_hud_icon);
}

unlimited_ammo_hud_string_move()
{
	wait .5;
	self fadeovertime(1.5);
	self moveovertime(1.5);
	self.y = 270;
	self.alpha = 0;
	wait 1.5;
	self destroy();
}

//blinking times match the normal powerup hud blinking times
unlimited_ammo_hud_icon_blink(elem)
{
	level endon("disconnect");
	self endon("disconnect");
	self endon("end_unlimited_ammo");
	time_left = level.unlimited_ammo_duration;
	for(;;)
	{
		//less than 5sec left on powerup, blink fast
		if(time_left <= 5)
			time = .1;
		//less than 10sec left on powerup, blink
		else if(time_left <= 10)
			time = .2;
		//over 20sec left, dont blink
		else
		{
			wait .05;
			time_left -= .05;
			continue;
		}
		elem fadeovertime(time);
		elem.alpha = 0;
		wait time;
		elem fadeovertime(time);
		elem.alpha = 1;
		wait time;
		time_left -= time * 2;
	}
}

destroy_unlimited_ammo_icon_hud(elem)
{
	level endon("game_ended");
	//timeout just in case aswell, shouldnt ever get used, but who knows if I missed something
	self waittill_any_timeout(level.unlimited_ammo_duration+1, "disconnect", "end_unlimited_ammo");
	elem destroy();
}

turn_on_unlimited_ammo()
{
	level endon("game_ended");
	self endon("disonnect");
	self endon("end_unlimited_ammo");
	for(;;)
	{
		//simply set the current mag to be full on a loop
		self setWeaponAmmoClip(self GetCurrentWeapon(), 150);
		wait .05;
	}
}

notify_unlimited_ammo_end()
{
	level endon("game_ended");
	self endon("disonnect");
	self endon("end_unlimited_ammo");
	wait level.unlimited_ammo_duration;
	//the same sound that plays when instakill powerup ends
	self playsound("zmb_insta_kill");
	self notify("end_unlimited_ammo");
}

Download to a precompiled .gsc you can use:
https://www.mediafire.com/file/h501pdsime694jx/BO2-Zombies-Custom-Powerup-Unlimited-Ammo.zip/file
https://www.virustotal.com/gui/file/e7efd7e643d5f5e2a4aa29c32af186b13d314b0915687f13724b88ec890bd604/detection

Hope someone finds some use, or maybe figures out how to add their own custom powerups, post them down below if you do.
And if you have any ideas for improvement, or other custom powerups, or any other custom stuff, post them down below. I might make them if I find them cool.

~Ox

Plutonium

Ox_