Select your shortcut to Dark
Reign 2 and right-click on it. Select 'Properties'. In the
section marked 'Target', add::
-cmd:"gamegod.studiomode
1;sys.runcode studio"
For example, if you
installed the game in "dreign2" on your C drive, then enter:
C:\dreign2\dr2.exe -cmd:"gamegod.studiomode 1;sys.runcode studio"
Start the game and you will
see a 'Tools' button at the lower right of the screen. Selecting this
button will allow you to load any campaign that you want. Click 'Tools'
again and then you can chose to 'Play Mission'.