New 2d game suggestions Thread

What do you think will be an amazing game plot or a new game idea for a 2d game?

I once wanted to make a open world 2D counter strike-like game with focus on AI and the AI interacting (not the AAA way like "what was that noise over there, lets poke our nose in here and die", but really good and effective squad play), while you would be trying to avoid fights/use booby traps or something.
Thinking about it, it kinda sounds like one of the older GTAs now.
But then I just used the source code to make Dungeoncraft. : )

so kinda like 2d top down mgs