Still my favorite real-time strategy game. This game is grid-based filled with mostly but not only dirt, and you cave in your rooms and ways. You'll have to manage the gold you find and place facilities in the rooms you made. What I thought is cool back then is that you can switch into first-person-perspective into any entity of yours and control them. But otherwise they will actually do everything automatically, you can but don't have to assign anyone to anything. And unlike many other games, you're playing the role of the "evil" one here, training demons, building dungeons, killing knights and slapping your minions so they work harder.
I love this game, it's different in so many ways from all other games. You can maybe imagine it as roleplaying-racing-game from top-down perspective. It's being rendered in voxels which are interactable, so like cars leave trails in the ground for example. The art-style and it challenging any expectations, first time I played this game my eyes had to get used to it, for me to even see whats going on. But also being thrown into the world with no clear goal or understanding, much like in real life, and unlike in many videogames.