Have watched the gameplay through video just released. I see almost no lake or river region on the map, which exist in EL1. Will these be added in the future.

And more importantly, will the sea rise again in the game? If yes then it means the cities might be drowned?

And is that mean there will be no navy battle in EL2?

I think that it will make a lot of sense.

Considering that it'll be a desert world.

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endlesschaser wrote:

And more importantly, will the sea rise again in the game? If yes then it means the cities might be drowned?

According to this article:

"We did discuss at the beginning, having [the sea] recess and come back,” de Waubert de Genlis tells me. “But we realised that no one likes to see what you’ve built destroyed, all your armies washed away after you worked for 50 turns on that army. So that's why we thought, OK, let’s go in one direction. (...)"

So, probably not.

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endlesschaser wrote:

Have watched the gameplay through video just released. I see almost no lake or river region on the map, which exist in EL1. Will these be added in the future.

And more importantly, will the sea rise again in the game? If yes then it means the cities might be drowned?

In the gameplay previews so far there are rivers, and interestingly the rivers will grow over the course of the game, as the ocean recedes. So yes, the aquadynamic tech will be useful, and may even become increasingly useful throughout the game.