I know that Adelantado was only supposed to be a trilogy, but I am really hoping there can be the 4th one. Is this possible? If not, can you suggest another similar game?
Unfortunately, the developers of Adelantado discontinued the game after the third release. There is no way that the forth version will be available. However, there are plenty of similar games that you can download and play. I suggest you take a look at ANNO 1404. This is a real-time strategy/city-building game with beautiful graphics and mechanics.