Oil Factory: Merge and Dig is an Android simulation game developed by Puffer Games. As the player, you are tasked with building your oil empire from scratch. The game begins with a Searcher tool that scans the terrain for oil mines. Your job is to increase the number of workers and transport more oil to the factory.

As you progress, you can merge machines and dig deeper into the terrain to access more oil. Upgrading the factory is also essential to increase the price of oil and become a millionaire. The game is free to download and play.

Overall, Oil Factory: Merge and Dig is an exciting simulation game that requires strategic thinking and planning. The graphics and sound effects are impressive and add to the overall immersive experience. It is an excellent choice for anyone looking for a challenging and entertaining game in the simulation category.