There was a game on Kongregate no long ago. It was about mining and it works a lot like Utopia Mining, with all the upgrades and and a driller digging the ground for expensive minerals. It’s not Motherload though, I’m quite sure. People say that it’s Motherload without earthquake and stuff.
Another one was quite an old online game I played years ago. It features some kind of war where you control one of the sides and the graphics are quite simple. You send different types of troops onto the field by pressing the numbers on the keypad.