Earth 2140 basically requires the player to complete various objectives, mostly destroying all opposing units and structures (or capturing them). Failure of missions happens when all the player's units are wiped out or a vital objective is not met. Structures are built by deploying mobile vehicles on suitable terrain. Mines used to fund the player with money for purchasing can only be built where ore is available. Materials used to gain funds at 1000 credits a piece are carried from a mine (or material on ground) by a BANTHA truck or Heavy Lifter and placed at the Refinery and converted into credits. Mines eventually finish when all ore is extracted.