If you download the dwarf campaign (custom campaign):
__https://dwarfcampaign.com/
…and watch the credits, the game will end up in a black screen at the end of the credits and you need to Alt+F4 to exit the game.
This is in the SD version of the game, which you get if you own Warcraft III: The Frozen Throne but have not bought Reforged. Game Version: 1.35.0.19887