Experience Experience is a numeric value based on performing activities in game. The more experience you earn, the higher your commander's level becomes. The ways you can earn it are as follows: When constructing or upgrading Buildings When upgrading Arms Commander's Level Commander's level is the base for upgrade the Headquarters's level. The number of tiles that you can remove increase as your commander level goes up. When the Commander’s level reaches 5, the Multiplayer mode will unlock where you can invade and loot bases of other players all around the world.