Microsoft takes up to 75% off a selection of Xbox One game and add-on downloads during its Xbox Live Weekly Sale. (Some discounts require an Xbox Live Gold membership.) A couple of best bets, both all-time lows and compared to the best available prices for physical copies:

• Forza Motorsport 5 Game of the Year Edition for Xbox One for $10 w/ Gold membership (low by $10)
• Star Wars Battlefront Ultimate Edition for Xbox One for $20 (pictured; low by $6, most charge $37 or more)