Turmoil: The Heat Is On is pretty much just like the original with a few new mechanics. The most notable one is alluded to in the title itself - magma. Now you can use magma to speed up oil extraction or even turn oil to gas, which you can connect to the buyer in order to increase oil prices. There's really not much to it - you find, drill, extract oil, sell it at a good price, buy upgrades and try to beat your competition. But despite its evident simplicity, it's surprisingly addictive, fun and memorable. A really good game.