I found this glitch in 2007

You just need save a file in your game, quit, start a skirmish with deathmatch mode, load your file of campaign

Every players of the scenario of campaign collect 20k of food, wood, gold

The warchiefs act 2 mission 5 is really strange

I know this glitch, too. And also, if you start an easy mode test in Map Editor, quit, then load the campaign file, it will also become easy mode But there are some differences from the Dark Age giltch in AOE2, you need to quit from game and start from the savefile. So @Mhmd_FVC Can we use these glitch in speedrun?