Redbox offers a coupon code good for a 1-night Blu-ray, DVD, or video game rental for free when you text "GAMENIGHT" to 727272. (The coupon can be used within the Redbox App for iOS or Android, or at Redbox.com.) That beats our May mention of $1 off all rentals and is the best coupon we've seen this year from Redbox. The coupon code you'll receive expires August 4.