Is there any plugin for a pathfinder like the one found in game maker?
You draw a path for the object to move, and when you place the object on the layout it will follow the path drawn relative to its position.
There is PathFinding in Construct 2 but it works a bit differently from what you mentioned. It can still be used to get what you want though, instead of drawing the line where it goes you can draw the borders where it cannot go... hope that makes sense.
There is also an example capx provided in Construct 2 for free, look for Pathfinding example when you open up Construct 2 and click new project.
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One or multiple paths would be great and much easier to do. Just draw a line, curve or whatever you want and then send mobs to move on them. I think this would be a great addition. You could make multiple paths and chose one randomly.