Basicly what i am saying is i currently have some enemies farther in the game that don't spawn at start to avoid my game from slowing down so when i pass a certain area it will load the rest of the enemies in VIA Trigger Zones. Is there something i can do to unload the part of the map i was just at or can i do it via LUA script?

Well, you can hide things, but from experience that does little to speed things up. Once an enemy object is spawned that's it really, hiding does little to help from there on. We need occlusion for this to be handled properly. You only really gain speed at the start by not spawning characters or objects.

You could use this script in a trigger zone to destroy the previous entity's . just change the entity numbers to those you want to remove.

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I am not sure if this still works with static entity's after recent changes but I have used this right up to v1.085 and it worked fine....try it and see.

That's okay as long as you don't want to go back of course

Yep, I guess that is true, I used this myself to create the illusion of level jumping as I wanted very different areas for the player to traverse and this was the only option at that time. The player wasn't going back again so spawned a rockfall or whatever to block passages after destroying the assets no longer required. Maybe destroyed and respawned could be a workaround if that is what you want, of course media would continue to be held in memory but should help with FPS at least. Once we have level load and unload or proper culling as you say, all this will work better and no need for funky workarounds

Still, for certain game types a nifty bit of code