NBA2K18, developed by Visual Concepts and published by 2K Sports is due for release on 19th September 2017 and, similar to last year, the free demo/trial called “The Prelude” is available for free on both Xbox One and PS4.
The Prelude gives players access to the new social space known as the neighbourhood as well as a head start on to the Prelude a full week before NBA 2K18 arrives and get a head start on their MyPLAYER career. The MyPLAYER career will also carry over for anyone who buys the full game.
— NBA 2K20 (@NBA2K) September 8, 2017
NBA2K17 Prelude enabled you to earn 1000 gamerscore in a matter of hours, so it will be interesting to see if the same happens this year, especially for all you achievement junkies out there!