: You can download a free Civilization V PC Demo on Steam to test the gameplay before purchasing.
While not free, the game frequently goes on sale for a fraction of its original price:
Sid Meier's Civilization V isn't currently available for a permanent free download from official digital stores. However, you can still experience the game or similar alternatives through legal means: Official Trials and Demos : You can download a free Civilization V
: You can often find highly discounted Steam keys on G2A or MMOGA . Sid Meier's Civilization® V on Steam
: A long-standing, community-driven strategy game inspired by the early Civilization titles, available for free on the Microsoft Store . Where to Buy Sid Meier's Civilization® V on Steam : A
: An open-source, lightweight remake of Civilization V that stays very close to the original mechanics.
If you're looking for the "Civ experience" without the price tag, these open-source projects are completely free: Free Alternatives
: Sites like Softonic offer trial versions for Windows users. Free Alternatives