Can you help identify these games?

Hi, I'm trying to identify 3 games which I briefly saw a few weeks ago as a demo at a store but I didn't see the titles and I was in a hurry, perhaps the description can help narrow them down?

1. Third person game. There's a guy with armor and sword going into battle and right around him are lots of similarly dressed soldiers/knights fighting what appears to be a siege of a castle/fort. Graphics are super cool.

2. RTS game. I saw some kind of airships, cities in the clouds.

3. RTS game. Looks like a zombie apocalypse in a steam punk alternative world.

Any info would be appreciated. Thanks in advance.

This is so easy!

1.Fortnite

2.Fortnite

3.Fortnite

3 makes me think of "They are billions"