Fossilfuel — is an adventure shooter with elements of horror and a first-person view. The game begins in a research center located deep underground on one of the islands of Alaska. Scientists have created mutant dinosaurs, but once the base is invaded by soldiers aimed at stealing a valuable type of DNA. The protagonist must repel the attack of unwanted guests and survive among the out-of-control prehistoric creatures. In addition to battles with enemies, you also have to solve puzzles.