Any good tower defense or RTS games for portrait mode??

[Wookieekiller]

I'm looking for some tower defense games you can play in portrait mode but it seem all of them are in landscape? Also does anybody know of a good OFFLINE rts game like command and conquer or age of empires that doesn't have any of that social\online garbage? I don't understand why every game like RTS games need an internet connection to play and always have to be cluttered up with all the social crap.