Microsoft's Ultimate Game sale Launched last night at 10:00 CAT and there's a substantial amount of Highly rated titles on sale.
The Bioshock Collection (84% on metacritic)
discounted 60% standard and 67% for Gold Members
Deus Ex: Mankind Divided (83% on metacritic)
DOOM + Wolfenstein II Bundle discounted 60% standard and 67% for Gold Members
Life is Strange Complete Season (85% on metacritic) discounted 70% standard and 80% for Gold Members
these are just a sliver of all the high quality titles on sale at the moment, the Sale expires on the 30th of July follow this link to see all the titles on sale for both Xbox one Family and 360 generation of consoles.