Ghostrunner has been updated to Version 1.3, which paved the way for the Winter Pack DLC. You can grab this DLC for $2, and it includes the following.
Completed Ghostrunner and looking for a new challenge? Take on Dharma Tower once again in the brand new Hardcore Mode and pick up a new set of skins with the Winter Pack DLC. Hardcore Mode creates an all new challenge for Ghostrunners! Unlocked after completing the main game, Hardcore Mode challenges players with altered level designs as well as tougher enemies from the beginning! Use all your newly acquired skills and abilities to take on a tougher Dharma Tower!