https://www.gamesessions.com/en/Game/GRIDAutosportLogin into your GameSessions account. Click the "Download Free Game" button and activate it before the offer expires. Play the game for 5 minutes to activate it, and keep it forever.
Offer ends on May 30th
Important Note: "Online multiplayer options are only available through Steam. We are unable to transfer your game progress to Steam for this game."
Enjoy!!