That one I also checked, and was my first choice being cross platform. For some reason it didn't run. Which is weird because when we talked about this earlier, it played.>0AD
Sometimes I take a look how the thing goes. It developed a lot.>genre
That would be RTS, but it has different "strains". And AoE is clearly from the line C&C started. Well maybe Dune II. It was long time ago. But they are from the same tree:
Produce workers in main building.
Gather resources with workers.
Build the rest of the buildings with workers.
Build Barrack Type 1 for basic soldier.
Build Support More Units building.
Build Barrack Type 2 for stronger soldier.
Build Research Tech building.
Upgrade resource gathering.
Send soldiers to enemy.
Soldiers march in a snaking line to enemy.
Get rekt by enemy one by one.
Gather more resources with workers.
Other type would be Settlers for example. Although it's the same concept of resource gathering, house building, unit producing, upgrading, it really feels different, it's just so lively, and the little dudes do their thing by themselves.
I think Dungeon Keeper would also be different. But maybe for the evil twist, and the distinctive units.
And I kinda remember stuff like Seven Kingdoms(?), it had a weird network system between buildings and such.