Energy

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Energy is the most basic resource in Screeps. It is used to spawn creeps, build structures, fill towers, and upgrade controllers. It can be harvested from Sources and transported using creeps with CARRY parts. Then, it can be used by worker creeps to perform tasks in your rooms.

Energy is overwhelmingly gathered through the mining of Sources, but can also be gathered through Market transactions. In some cases, Energy is used by players as a form of currency, and can be used to indirectly transfer credits to other players, as energy prices are (relatively) stable and can be easily sold.

Energy management is key to success in Screeps. Storages, Links, Containers, all help provide ways to manage and store energy. See the pages for these items to see more details about their use.