Pick up Age of Empires: Definitive Edition for 50% off during the Age of Empires Franchise Sale.
https://store.steampowered.com/app/1017900/
You can also save up to 75% on other titles in the Age of Empires franchise now through April 6!
Age of Empires Franchise Sale - Age of Empires: DE - 50% Off!
Source: Steam Community (opens in a new tab)