Sentence:  So as a developer you've got to have a way to create characters of any particular skillset & level, insert them into any dungeon level, set up chosen maps, conjure particular equipment and/or monsters, etc. So as a developer, you almost have to develop a "<WSD>god mode</WSD>" or "wizard mode" that allows you to do such things. 
Meaning of the word marked with <WSD> tags:  A mode of play in (mostly) roguelike games, allowing the player to create objects on demand, to be resurrected in the case of death, etc.