So I recently bought NBA 2k18 during steam sale. After downloading for about 57gb, you will need to download some files when you are in game. Now on gameplay, one major thing I noticed is that AI defenders are now smarter and it's easier to land an open shot because they will always contest, and they are fast when contesting shots. Players are thinner compared to NBA 2k17 (or is it just me? ). I haven't tried MyGm, MyCareer, and Season yet. But I will surely try those. So far in Play Now mode, I enjoy playing it + you can choose different rosters from the roster selection (you have to download tho). For me it is very worth buying this game.