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Arcanum is released with a very interesting extra bonus -- a WorldEdit map creator. This special extra program allows game players to create custom maps and dungeons. Unlike a lot of the game editors or map creators in other roleplaying games, the developers of Arcanum promise that this particular editor will be extremely user friendly.
Any Arcanum player, from expert to novice, will be able to create simple dungeons and fill them with basic monsters really quickly and easily. Adding scenery will not be difficult, because all the scenery objects will be categorized to make it easier for players to navigate and find certain things. With the scenery creator, you can make swamps, forests, deserts, or grasslands -- your choice. Along with the scenery, you can also add and create all different types of buildings. The editor will identify an object that you are making as a building once doors and windows are added to it.
You will be able to go as far as to set preferences as to what level of skill will be needed to open any locks, as well as what time of day or night that a certain street light will turn on. You can do your editing in isometric (or top-down) view, meaning the dungeons can be mapped out in squares, similar to the early RPG days of using graph paper. You can add monsters and treasure to find and be able to adjust their attributes and conditions like almost everything else in the environment. Basically, every tool that the developers had used to create Arcanum will be included with the game in this editor program.

You can CLICK HERE to view more screenshots. Below you will find more information and help tips on how to use this game editor program.

Arcanum Dev Chat Log 01/25/2002
Lots of questions by modding folks answered by Arcanum's developers from Troika Games

Mod Building 101 - "The Dungeon Crawl" - A tutorial by Sharon Shellman
Read Sharon Shellman's introduction to the Worldeditor and follow her steps to create your first own mod.

Download "The Dungeon Crawl" and the first tutorial
If you liked to follow those instructions or just want to play the module, you can download it here. It is a zip.file and you have to save it to your computer's hard drive. You will need an unzipping program like WinZip to unzip the file. Once it is finished downloading, unzip the file and extract it to your mods directory. The mod itself is a file called dungeoncrawl1.dat, the tutorial is a word.doc file named WorldEdTutorial1.doc.

Mod Building 102 - "The Dungeon Crawl Revisited" - The 2nd tutorial by Sharon Shellman
Read an introduction to the basics of module creation, showing how to add NPCs, shopkeepers, dialogue, scripts and more.

Download "The Dungeon Crawl Revisited" and the 2nd tutorial
If you liked to follow those instructions or just want to play the 2nd module, you can download it here. It is a zip.file and you have to save it to your computer's hard drive. You will need an unzipping program like WinZip to unzip the file. Once it is finished downloading, unzip the file and extract it to your mods directory. The mod itself is a file called The Dungeon Crawl.dat, the tutorial is a word.doc file named The Dungeon Crawl Revisited.doc
Please remember, if you have installed the first module The Dungeon Crawl, be sure and completely delete your existing The Dungeon Crawl.dat and its corresponding mod directory BEFORE you install the new module.

Uncompressed version of The Dungeon Crawl Revisited
To further aid you in mod making, you can download an uncompressed version of The Dungeon Crawl Revisited module in a zip file. This will allow you to go through the dialogs and scripts contained in The Dungeon Crawl Revisited so that you can gain a better understanding of how to create dialog and scripts and what they are capable of.
It is a zip.file and you have to save it to your computer's hard drive. You will need an unzipping program like WinZip to unzip the file. Once it is finished downloading, unzip the file and extract it to a directory you want the uncompressed files of the mod to be in.

Download a list of generic dialog codes and their meanings
It is a zip.file and you have to save it to your computer's hard drive. You will need an unzipping program like WinZip to unzip the file. Once it is finished downloading, unzip the file and extract it to a directory you want the WorldEditor docs to be in.