Recently the official website for Steins;Gate 0 has streamed a new gameplay video. It is said that it centers on the “sealed Hoouin Kyouma”. The game mind you will also be releasing December 10th on the PS3, PS4 and PS Vita. The game is priced at 7,800 yen for the PS3 and PS4 versions and 6,800 yen for the PS Vita version. A anime adaption for the game is in the works as well. Three stories from the novels will also be included for the game, some being from the drama CD’s. A download code for a HD remastered version of the original game will also be included with no plans to sell it separately. The HD remaster of the original Steins Gate visual novel for the PS4 will also have 1920×1080 resolution as opposed to the 1280×720 resolution when it was on the Xbox 360 and PS3 originally.
Now the original game itself released on several other platforms since its original release on the Xbox 360 in 2009, it would later get ports to the PC, PSP, iOS, PS3, PS Vita and Android. The visual novel would also later get a anime with 24 total episodes released for it, that aired between April 6th 2011 and ended September 24th 2011. Below is a plot summary for the upcoming game that you can see quoted from ANN:
The story of the game and the anime adaptation take place on the beta world line, where Okabe could not save his precious person, Kurisu, on July 28, and ended up returning alone. However, the trailer for the game notes that Okabe does not know that Kurisu is in fact still there