Don't know if this is the right place, but I'd like to give some arguments to only doing maintenance on this version of Wintermute. Games are hard work, and 3d games are by far the hardest, much harder than 2.5D because you have to worry about doing low poly work etc. I've messed around with Unity, and there's a huge difference between that and 2.5D on Wintermute. This engine is fairly light. It runs on almost any computer, even laptops. Adventure games are casual affairs and casual game players don't have much horsepower on their machines. 2d and 2.5 games are still popular and will probably always be popular for casual players. Take a look at Big Fish games. That's where most of the adventure games on the market reside from what I've seen. I hate missing object, though. 3d adventures take a team and are an extreme risk because they aren't very popular.