Summary: A slight variation on chest (or upsized chest) storage. The structure (a 5x5) can only store a single type of item, but can store up to 2400 stacks of that item. The structure has a power upkeep, which if not met, prevents items from being inserted/removed. The structure has a decent amoun...

I don't know how familiar the Hardcore-Quest-Mode mod from Minecraft is to you, but there are some really neat ideas in there that I feel would fit very well here. In short something like this: There can be 1 or more quest-lines, each with 1 or more quests, each with 1 or more objective-groups, and ...