Worker System

Every player has a limited number of parallel “workers” (default: 1, expandable through the Premium Shop up to a maximum of 3). A worker is occupied by:

• A running miner upgrade
• A running facility or infrastructure upgrade
• A running maintenance/repair (service job)
• A running installation

When all workers are busy, you’ll see the error “WORKER_BUSY” — you must wait for a job to finish, or buy an additional worker in the Premium Shop.