Strategy classic Warhammer 40,000: Rites of War is free to keep on GOG.COM until July 19th, 1 PM UTC.
To redeem the free game you need to click on a banner on the front page of GOG.COM.
I also invite you to check our Warhammer Weekend with deals up to 80% off, including newly released on GOG.COM games: Warhammer: Chaosbane (-65%), Space Hulk: Deathwing – Enhanced Edition (-67%), Battlefleet Gothic: Armada (-70%), and Battlefleet Gothic: Armada 2 (-60%), many classic titles like Warhammer: Mark of Chaos – Gold Edition (-20%), and more.
You can find the full offer here: https://www.gog.com/partner/warhammer
Warhammer Weekend runs until July 20th, 1 PM UTC.