One of main features in Hidden Deep is physics simulation engine (based on fantastic Box2D library). All objects in game are interacting with each other and terrain (which is destructible by the way) with respect to basic laws of physics.
In Hidden Deep you have to operate variety of heavy mining machinery and other mine equipment like tunnel boring machines, lifts, gantry cranes,
bridge building machines, dump-trucks, elevators, hydrauilc gates, various transport systems (like conveyor belts, rail wagons etc.), mining explosives,
steam powered machines and many many more.
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