Steam has Rise of the Tomb Raider: 20 Year Celebration (PC Digital Download) on sale for $7.49. Offer ends July 9, 2020. Steam account and application required to activate/play.
Rise of the Tomb Raider: 20 Year Celebration includes the base game and Season Pass featuring all-new content. Explore Croft Manor in the new "Blood Ties" story, then defend it against a zombie invasion in "Lara's Nightmare". Survive extreme conditions with a friend in the new online Co-Op Endurance mode, and brave the new "Extreme Survivor" difficulty. Also features an outfit and weapon inspired by Tomb Raider III, and 5 classic Lara skins. Existing DLC will challenge you to explore a new tomb that houses an ancient terror in Baba Yaga: The Temple of the Witch, and combat waves of infected predators in Cold Darkness Awakened.