A compliment to my recent root beer PR, since I've been on a retro CoD Zombies kick lately, this PR adds a new admin structure that randomly rolls an item and presents it to the player like the mystery box from... well, CoD Zombies.
The music that plays while selecting is The Ragtime Drummer by James Lent, sourced from freemusicarchive.
There's a base version that can spawn any item that the christmas tree/santa's bag can spawn, and then there's a subtype that draws from the Summon Guns list only. If you want, you can use the base type to generate a list of any subtypes of a given path, or you can edit the valid_types list to only consider specific types of atoms.
33dd1d811b