levels
The number of levels required to unlock each additional slot. For example, if this is set to 2, the player will need 2 levels to unlock the first additional slot, 4 levels for the second, and so on.
The number of levels required to unlock each additional slot. For example, if this is set to 2, the player will need 2 levels to unlock the first additional slot, 4 levels for the second, and so on.