After publishing rights changed hands back in August 2016, both Guilty Gear X2 #Reload and Guilty Gear Isuka were removed from Steam. Not much had changed until January 6th when one forum post asking where the game was elicited a response from one of the developers at Arc System Works.
Sure enough, both games were returned to sale later on January 6th with the publisher changed from KISS ltd to Arc System Works. I’ve updated both game pages on the site.