A dream game idea I had would have a PvP type game, any setting (medieval fantasy or space or western or modern/sci-fi battlefield) where you simply take control of one of three or four soldier types(or knight, cowboy, whatever, doesn't really matter, but fitting the setting) and each soldier type would play a role on a battlefield, with a rock paper scissors-like mechanic. One would have clear advantages and disadvantages against certain unit types. 2 teams would compete in capture the flag / last team standing / last man standing, etc, and there would be a very strong focus on PvP. I wouldn't want to boggle down the player with too many options upon entering the game, more like join a server, choose a unit with predefined weapons, and choose one side of two teams. I would really love to see this dream as a real 2d pixel game someday...