https://store.epicgames.com/en-US/p/sid-meiers-civilization-vi--platinum-edition

click Get button
verify the game is free
complete "purchase"

https://store.steampowered.com/app/1035510
Free till July 15.

https://store.steampowered.com/app/1025440/Fantasy_General_II/
https://store.steampowered.com/app/1368870/Field_of_Glory_II_Medieval/
https://store.steampowered.com/app/544610/Battlestar_Galactica_Deadlock/
https://store.steampowered.com/app/2921380/Caribbean_Crashers/

all free until July 17th

• Go to the store page
• Click the GET button
• Verify the game is free

https://store.epicgames.com/en-US/p/figment2-creed-valley

https://store.epicgames.com/en-US/p/sky-racket-4cf23a

Free till July 17.

https://store.steampowered.com/app/582660
Free till July 10.

• Go to the store page
• Click the GET button
• Verify the game is free

https://store.epicgames.com/en-US/p/backpack-hero-449c5e
https://store.epicgames.com/en-US/p/figment

Free till July 10.

https://store.steampowered.com/app/1356040/Ampersat/
Free till July 6.

https://store.steampowered.com/app/624690/NEXT_JUMP_Shmup_Tactics/
Free till July 1.

• Go to the store page
• Click the GET button
• Verify the game is free

https://store.epicgames.com/en-US/p/sable

Free till July 3.

https://store.steampowered.com/app/252410

Free till June 26.

https://store.steampowered.com/app/431710/Space_Pilgrim_Episode_II_Epsilon_Indi/

Free till June 26.

• Go to the store page
• Click the GET button
• Verify the game is free

https://store.epicgames.com/en-US/p/the-operator-b835e9

Free till June 26.

• Go to the store page
• Click the GET button
• Verify the game is free

https://store.epicgames.com/en-US/p/two-point-hospital

Free till June 19.

https://store.steampowered.com/app/610570
Free until June 17.

https://store.steampowered.com/app/2752710
Free till June 24

https://store.steampowered.com/app/2928340/Holy_Clash_Cards/

Free till June 9.

https://store.steampowered.com/app/49520/Borderlands_2/
Free until June 8th
Warning, they apparently changed the user agreement to require root level data and threats of game bans for any sort of modifcation or vpn usage

• Go to the store page
• Click the GET button
• Verify the game is free

https://store.epicgames.com/en-US/p/deathloop

https://store.epicgames.com/en-US/p/ogu-and-the-secret-forest-ffc421

https://store.steampowered.com/app/1608450/Hellslave/

free until June 16th