Oilman is a free game available on iPhone developed by VOODOO. The game is set in an underground land where the player is tasked with digging deeper to uncover secrets and pump out all the oil. The game starts with a simple pickaxe, and as the player progresses, they can upgrade their tools to dig deeper.

Oilman is an engaging game that requires strategic thinking and planning. The game's graphics are vibrant and colorful, and the sound effects are realistic, immersing the player in the game's world. The game's controls are easy to use and responsive, making it easy to navigate through the underground land. Overall, Oilman is an exciting game that keeps the player engaged for hours.