Steam link. Check Rebirth's Steam homepage too just in case details of any offers are not displayed everywhere.

"Home of Light is the second expansion for X Rebirth, with new regions to explore and challenges to overcome. Along with the 4.0 update, the experience reaches a whole new level where the opportunities to TRADE, FIGHT, BUILD, and THINK have never been bigger.

Take on the X Universe with new weapons and missiles, and hunt around for new hidden treasures in X Rebirth's biggest expansion yet!"

Release Date: 25 Feb 2016