Redbox.com is offering a 1-Night Video Game Rental for Free when you text GAMES to 727272 and join their Text Club.
This does enroll you in their Redbox Text Club, but you can text STOP to end after you receive code.
If you have already joined their Text Club, text STOP and then try GAMES again. (see post #2, thanks txjester)
Your unique codes should arrive shortly and are valid at the box, online or with the Redbox App (Android or iOS).