It is very possible to make custom scenarios and free build maps directly in Stronghold Crusader Extreme; this post will teach you how to both play and create scenarios for Stronghold Crusader Extreme (henceforth SCE or Extreme).*
* - This tutorial will focus on custom scenarios, but similiar instructions can be followed for Crusade Extreme.
Part I - Accessing the Custom Scenario Menu in SCE:
------------------------------------------------------- If you've already prepared your save file, you can skip to step 13.
Open up Stronghold Crusader (not Extreme) and open the map editor.
Create an invasion map and save it under the name "SCE_Custom".
Place the keep and the granary on the map (anywhere's fine).
Add the win event as having no objectives and put it to basically launch when the level starts (actually, there is a delay).
Save your map.
Load the map in Crusader and save it as soon as it loads as "autowin" then exit Crusader
- Save your castle builder save as "autobuild" to differentiate between the two
These steps apply to Windows (not sure for other OS's):
Open your documents folder.
Find Stronghold Crusader or something along those lines.
Open the folder where your Crusader save files are stored.
Right-cluck and press copy on the save you saved early (cut works too).
Go up 1 folder and find the ExtremeSaves folder (or something along those lines).
Paste the save into that folder. Your save file is now prepared (in other words, you don't have to do any of the steps from 1-10 again on your computer)
Open SCE and load the "autowin" save.
To speed things up for future times, keep saving the file under the name of "autowin" until you win.
Wahoo! You are now in the SCE custom scenario selection area.
Note - I am not nor do I claim to be the original author of the above content. These instructions I found from Stronghold Haven by a forummer of the name of Heroesflorian. The next part I am the author of.
Part 2 - Creating Extreme Scenarios Directly in SCE: