At first I was thinking about a campaign but that's too much. I find that BoneLab gets boring because of the lack of campaign style mods, and to ensure that this game won't suffer that, I want dev made missions. Also tools to help modders make missions easier. Checkpoints, Patrol Pathing and Chunk Loading/Auto-Loading Another Level.
I know this even without any missions at all, not even mods, this game would be amazing and wouldn't get stall. This game will be my favorite game of all time.