This milestone defines 2nd stage of AE development.

During 1st stage (which lasted from the beginning) we were working on most base functionality of the software - mostly not including any game related features.

During this stage we're going to focus on the base of game related features' engines, such us: items, skills, actions, npc AI and some small additional features.

After this stage we'll have all mentioned systems working. But it doesn't mean that all skills will be working - it'll mean that the base system for skills is working. Having skills working will mean to define for example all effect handlers (what will be an easy work [from the coding point of view], but as there'll be a lot of effect handlers [I guess so], they we'll be being done for a long time ). The same is for AI - we'll have the AI engine working, what doesn't mean we'll have ai for all npcs/monsters. These will have to be created ( and again - it'll be easy work (from the coding point of view) [just creating some event handlers], but will require game related knowledge ( how which npc/monster behave etc ), so it'll be being created for long time, when new info is being gathered )

This milestone doesn't belong to any "ae development stage" and contains all the task that will be done later or can be done in meantime. It also contains some simple tasks that can be done by community.