Evil Genius is a game from 2004 developed and published by Elixir Studios.
Your goal in this game is simple...you just have to conquer the whole world. How are you going to do that, you may ask? With an immense army of minions that do your bidding. You will have to recruit, train and then use your troops carefully as you manage to create the evilest lair that was ever built.
Conquering the world is not an easy task. It will take time, to gather knowledge, while staying low on heat. Don't let inspectors find your nasty works, or if they do find....make sure they don't escape your lair, alive that is.
But, I don't want to spoil all the fun for you. It costs only $10 on steam, but I assure you if you are into base-building games, games like Rimworld, Oxygen Not Included, or Factorio, you will definitely love Evil Genius too.
Have fun!