Item codes
It is widely believed (among Firefox UD extension developers) that the inventory of each player is stored as a single string in a field of the user's line in the users table of Kevan's UD Database. Only Kevan knows for sure, but so far nothing seems to invalidate this hypothesis.
Each item is stored in the inventory string as a letter, eventually followed by a number if the item needs extra info to be defined. This is so far the case for only three items: the shotgun, the pistol, and the radio.
The length of the string is used as "weight". If a search is successful, the message "You cannot carry any more" will appear if the string length is equal or greater to 51.
Actions that change the inventory
When a search is successful, the length of the inventory string is used as "weight" to check if the player can add an item to his inventory.
The message "You cannot carry any more" will appear if the string length is equal or greater to 51. Since shotguns and pistols require 2 characters, they count as two items. Since radios require 5 characters, they count as five items.
If the string length is 50 or less, the item code is appended at the end of the inventory string, possibly making it longer than 51 characters in the process.
Knowing this can be useful when finding unwanted items: The one you just found is at the very end of the Drop List.
- Using an Item
Some items disappear from your inventory when used. (Beer, Wine, Newspaper, Spray Can (if unlucky), etc.) Only the code of the item is sent to the server, not the actual position of the item you clicked. The item removed from your inventory string is the first encountered in the string that matches the sent code.
- Dropping an Item
Same as using it, only the item's code is sent. The first match in your inventory string will be removed. This can sometimes be confusing, when you drop the unwanted item you just found, clicking on the last value of the dropdown box (a second fire axe for example) and see first disappear instead. The associated number described above is sent too; so when you choose to drop an empty shotgun, you'll drop the first empty shotgun in your inventory.
- Reloading
Reloading doesn't send any extra information to the server. The game will find the weapon of that type with the lowest ammunition count and reload it. If there is more than one weapon with the same ammo count, the first will be reloaded. The ammunition itself will disappear in accordance with the usual rules given above.
- Firing
When you fire at something/someone, only the type of weapon is sent to the server, you cannot specify the which of your pistols/shotguns you'd like to use. The weapon used is the first in the list that is of the correct type and has at least 1 shot left. This is not optimal in terms of inventory space. The ideal scenario would have been to fire the gun with the least shots left, providing it is not empty. Knowing this, you can plan your reloading more efficiently. For example, assuming your first pistol is empty and second has one shot left, it would be advisable to wait for next shot before reloading both guns. If you reloaded immediatly, you would have to empty the entire pistol before being able to reload the second efficiently.
Items' Internal Letters
| Code | Item Name | Category |
|---|---|---|
| a | GPS Unit | Useful Items |
| bX where X is the number of shots left. | Pistol | Firearms
b6 for a fully loaded pistol |
| c | Flare Gun | Useful Items |
| d | Crowbar | Melee Weapons |
| e | Baseball Bat | Melee Weapons |
| f | Flak Jacket | Useful Items |
| g | Kitchen Knife | Melee Weapons |
| h | First Aid Kit | Useful Items |
| i | Fuel Can | Useful Items |
| j | Mobile Phone | Useful Items |
| k | Pistol Clip | Firearms |
| l | Book | Assorted/Misc Items |
| m | Crucifix | Assorted/Misc Items |
| n | Newspaper | Assorted/Misc Items |
| o | Fire Axe | Melee Weapons |
| p | Length of Pipe | Melee Weapons |
| q | Pair of Wirecutters | Assorted/Misc Items |
| r | Shotgun Shell | Firearms |
| sX where X is the number of shots left. | Shotgun | Firearms
s2 for a fully loaded shotgun |
| t | Beer | Assorted/Misc Items |
| u | Wine | Assorted/Misc Items |
| w | DNA Extractor | Useful Items |
| x | Spray Can | Assorted/Misc Items |
| y | Poetry Book | Assorted/Misc Items |
| z | NecroTech Revivification Syringe | Useful Items |
| A | Portable Generator | Useful Items |
| BXXXX where XXXX defines the frequency, | Radio | Useful Items
B2710 would be for a radio (27.10 MHz) |
| C | Radio Transmitter | Useful Items |
| D1 | Pool Cue | Melee Weapons |
| D2 | Cricket Bat | Melee Weapons |
| D3 | Fencing Foil | Melee Weapons |
| D4 | Ski Pole | Melee Weapons |
| D5 | Tennis Racket | Melee Weapons |
| D6 | Hockey Stick | Melee Weapons |
| D7 | Golf Club | Melee Weapons |
| F | Binoculars | Useful Items |
| G1 | plastic Christmas tree | Decorative Items |
| G2 | red Christmas lights | Decorative Items |
| G3 | green Christmas lights | Decorative Items |
| G4 | white Christmas lights | Decorative Items |
| G5 | dead fir tree | Decorative Items |
| G6 | Stale Candy | Assorted/Misc Items |
| I | Museum Piece (in general) | Decorative Items |
| IXX, XX is a number | Certain Museum Piece, (for example, I24 is a European Painting) | Decorative Items |
| I81 | pumpkin | Decorative Items |
| J1 | toolbox | Useful Items |
| J2 | video camera | Monroeville only item |
The missing items
Note that the letter v is missing. Some think it's the letter for the Mark One revivification syringe. Others think there is a super-secret item, undocumented in the wiki. Should you own an item identified with the v letter, please add the missing info here.
Letters E and H are now also missing.
It wasn't documented, however they are believed to be Christmas Decorations (plastic and dead trees, christmas lights) that may no longer be found in game. Strike: on 10th December 2007 christmas items are back and this time we've caught the codes (all on letter G)
