https://store.illegear.com/game-ready-perfo...gear-raven.html

Illegar Raven ? For RM 3k , you get a decent GPU - works well with eSports

Anno 1800 - might work if you crank down the settings

Unless you want it to be even cheaper...
My take is to pick up a good MacBook Pro 2012/2013 model and upgrade it. The reason being is that iTunes on Windows is pretty much !@#@$

If you use iPhone a lot - i mean a LOT - consider getting a mac for the synergy - not sure if you can pick up a new mac for under 3.5k , i have not been keeping touch with it

Then anyone would do - you can look at similiar suggestion for that price range

Seriously - if you are an iTunes/heavy iPhone user - consider getting Mac. I am an ex-mac , ex-iphone user , so I know about this
Best bang for buck , custom-made tested , for RM 2999 it's pretty good....1050 is okay for eSports and other light gaming (you can play most games at full hd medium settings anyway)

Define smoothly

You okay as long can whack at any resolution/any graphics settings ?

I need to know smooth , also smooth in DOTA can mean latency/lag

So be clear on the requirements here , graphics details or how...?