The Microsoft store appears to have given the game away early, but ReCore looks to be getting a definitive edition slated for 29th August.
The store page shows ReCore Definitive Edition as launching at $19.99 and you can preorder it there. The definitive edition includes “the new ‘Eye of Obsidian’ adventure and ‘T8-NK’ Corebot frame.” T8-NK was shown off quite awhile back and was scheduled for early 2017, but it seems it may release with this definitive edition. The case also shows that this edition will have HDR and be Xbox One X enhanced upon that consoles’ release.
This definitive edition had been rumoured over the past few days, and the ReCore Twitter account tweeted on 15th August to listen out for what’s next for the game on 20th August.
— ReCore (@ReCoreGame) August 15, 2017