Microsoft currently has a digital game sale going with Titanfall 2 Ultimate Edition for only $6 with Gold.
https://www.microsoft.com/en-us/store/p/titanfall-2-ultimate-edition/bt21jh17gcvc?rtc=1
List of other games on sale from Reddit.
https://www.reddit.com/r/xboxone/comments/85oh98/deals_deals_with_gold_and_spotlight_sales_for/