I've started creating scenarios for Gladius.

They are mods with very altered rules, pre-made armies and limited or inexistent rebuild of units.
They also have somewhat of a story.

All instructions and details are on the mod page.

The first scenario is here : https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=2777270410 , it will have you play the Astra Militarum, defending a hive city against a Waaagjh!

The scenario comes with 7 levels of difficulty.