I have Heroes of Might and Magic 3 Complete. I'd like to play the initially locked campaigns that get unlocked after you beat the entire available list. Is there a way to do it without beating the entire list, e.g. by using some 3rd party unlocker, obtaining a saved game, etc.? And if so, where can I get that tool/saved game/whatever?
As per Raven Dreamer's comment, there is a cheat code you can use to automatically win each map. Start the map, press TAB and then enter nwctrojanrabbit and press ENTER. You should be able to do that on each map to finish the campaign and unlock the next campaigns.
There is also a saved game that can be downloaded which has all of the campaigns unlocked.
Per au revoir's answer, you can use a code to instantly beat levels. But, cheat codes are version-specific. nwctrojanrabbit doesn't work for HOMM3 Complete edition. For that, you need nwcredpill instead.
P.S. I ran into this problem because I kept starting new campaigns from the main menu instead of by loading a saved game. Unlocked campaigns are save-specific, NOT universal!