Not Like Dungeon Keeper, but OK if they patch it.
Dig tunnels, gather resources, place rooms, train minions, and explore the local dungeon. The gameplay has a lot of interesting concepts that don't feel nearly as fleshed out as they could have been, but work together to make a somewhat enjoyable game.
Unfortunately the game is riddled with bugs many of which are game crashing, and because units and traps are so limited and rooms are so simple and pre-made, the whole "Craft your perfect dungeon" appeal is missing.
I really want to love this game, games like this are quintessential to the PC gaming experience, this game just doesn't live up to it's potential and it still needs some serious patching. It's an enjoyable distraction if you can forgive it's faulty quirks, but it's not like Dungeon Keeper.