Each level can unlock new abilities and increases hp, mana, movement and practices. The highest level in your chosen classes is called the primary level while the sum of the four highest classes is called total level.
The main level requirement is experience which is obtained by doing various things like killing mobs, doing quests using spells etc Once a character gets high enough there is a secondary requirement which is fame, this is obtained by killing the various boss mobs in an area.
20 fame is required for each level past 30 in your primary class 20 fame is required for each level past 26 in your secondary class 20 fame is required for each level past 22 in your third class 20 fame is required for each level past 18 in your fourth class 20 fame is required for each level past 14 in your fifth class 20 fame is required for each level past 10 in your sixth class
God level is different to player level in that a god is not designed to be a playable character rather a building and/or an administrator. God levels range from 100 to 110 (tot 400 to 440) which represent which builder commands they have access to.
High cost level are split into micro levels so you don't have to get all the experience all at once before you can next level.
At the upper level ranges there may be a twenty-four hour period between been able to micro level again, this can be reduced by twelve hours by using the train microlevel command.