KCS: We have four themed tileset compilations currently released, the city pack, dungeon pack, rural pack, and wilderness pack. The tile packs work in conjunction with our base hak and CEP. The base hak contains models and textures that would have been duplicated across other files if we had we left them in each separate hak. But the base hak also includes all the non-tileset related content also such as item, creature, and placeable appearance types, visual effects, animations, etc - things that we really felt were 'must haves'. Where much of the content in the tile packs is made up from the work of various authors across the community, a good portion of the stuff in the base hak is C.R.A.P. team original content and can only be found there.