Fossil Dig centers on excavating for dinosaur fossils and building a business around the materials and finds. Players manage excavation machines, collect sand, and exchange it for money to support fossil-hunting expeditions. The game also connects discoveries to a collection of dinosaur skeletons, including well-known species such as Tyrannosaurus rex and triceratops.
Machine upgrades change excavation
Excavation machines can be upgraded to improve their efficiency and digging depth. The source also describes upgrades as increasing capacity, and says they are purchased with in-game currency. These stated effects shape the digging operation: upgraded machines can work more efficiently and reach greater depth, while the money gathered through excavation supports those purchases. The description does not specify upgrade costs or exact performance changes.
Sand and bones support progress
Collecting sand and exchanging or selling it provides money for expeditions and business growth. Dinosaur bones are another source of value: players can discover, collect, and sell valuable finds. Collecting bones is also tied to completing levels and expanding the skeleton collection, so fossil discoveries contribute to both the stated collection and game progress. The source names Tyrannosaurus rex and triceratops as examples, but does not describe particular requirements for finding them.
Automation and business income
As the business grows, modern technology can automate tasks and generate income automatically. The description presents this income as continuing even when players are not actively playing. This provides a second stated way for the business to earn money alongside collecting and selling sand or bones. The source does not explain the specific automation steps or how income is calculated, so those details are not specified.