Originally Posted by Dorkus
My understanding is that the system works like this. The game spawns creatures at your level, or slightly lower. If a creature spawns when you are at a low level (e.g. you pass a loading zone in the world map), it will stay in the game. So if you are level 20, there are no new wolves (who are level 1 or level 6 creatures), or at least there will be an extremely low probability of spawning, but existing wolves will not be "removed."
What is absolutely true, however, is that you will never see a mountain lion or bear at level 5, but suddenly at around levels 15 and 20, you will see them constantly. Why? Because they are "too dangerous" for the character until he reaches that level. That, in my mind, is completely ridiculous. The entire point of an rpg is to: 1) be a model of a real world, which will include some things that are stronger than you, when you are an inexperienced adventurer; 2) create interest and excitment, as well as challenging goals to achieve (all of which will be precluded when you know everything you fight will be exactly manageable).
Different people have different views, however. Obviously, if you are not the type that likes dying and reloading, you will not care at all if there are powerful creatures in the world for the simple reason that you will never seek them out or engage them. But for a large contingent of players, I think, an "on-level" world is just extremely dull. It does not seem "realistic" for the entire world to adapt to your level.