The use of the term "break" to describe something as mundane as difficulty reduction is such a waste when so many games are full of things which are
truly breakable.
If we're using Oblivion as an example:
Step 1: Kill somebody. Any NPC humanoid will do.
Step 2: Grab-key their corpse, and toss them a couple feet into the air. This is easier if you've modded the physics but you can drag them over a steep ledge in a pinch.
Step 3:
While they're still in midair, pop open up the console, select them, and toggle off their AI. Inexplicably, Oblivion's ragdoll physics are under the jurisdiction of the AI, and as such the corpse will freeze in midair when you exit the console.
Step 4: Close the console, pop it back open, and resurrect the victim. For reasons I can't begin to imagine, this results in the ex-corpse being converted into a quantity of saltwater taffy.
That's how you break a game; nuts to you and your convoluted godmode.
Jam it back in, in the dark.