Starting Dec. 16, a number of titles for the Xbox One and Xbox 360 will be on sale -- with as much as 85% discount -- for both Xbox Live Gold members and non-members. As listed by Major Nelson, 17 Xbox One and 33 Xbox 360 games will be up for grabs. The sale is part of Xbox's "Countdown to 2015" promotion, which includes daily and weekly deals. Except for daily deals, the current list lasts until Dec. 22, wrote IGN.

Below's a quick reference to the discounted titles. Note that prices and availability may vary depending on your region. Data are subject to change without further notice.

Please be guided: Game - Original Price / Sale Price (Discount %)

Xbox One

"Assassin's Creed Unity" - $59.99 / $49.79 (17% off)

"Battlefield 4" Premium Edition - $59.99 / $30 (50% off)

"Call of Duty: Ghosts" - $59.99 / $30 (50% off)

"How to Survive: Storm Warning Edition" - $19.99 / $13.39 (33% off)

"Killer Instinct" Double Ultra Bundle - $79.98 / $53.59 (33% off)

"Kinect Sports Rivals" - $49.99 / $25 (50% off)

"Lords of the Fallen" - $59.99 / $35.99 (40% off)

"Metal Gear Solid V: Ground Zeroes" - $19.99 / $6.60 (67% off)

"NBA LIVE 15" - $59.99 / $38.99 (35% off)

"Powerstar Golf: Full Game Unlock" - $19.99 / $10 (50% off)

"Pro Evolution Soccer 2015" - $59.99 / $40.19 (33% off)

"Wolfenstein: The New Order" - $59.99 / $30 (50% off)

Xbox One (Gold)

"The Crew" and "Assassin's Creed Unity" Bundle - $119.99 / $89.99 (25% off)

"The Crew" and "Far Cry 4" Bundle - $119.99 / $89.99 (25% off)

"The Evil Within" - $59.99 / $30 (50% off)

"Thief" - $39.99 / $13.20 (67% off)

"Magic 2015" is one of the games listed by Major Nelson, and it's said to be exclusive for Gold members (50% off). However, it's not advertised by Xbox at this point (see this list). Inquisitr reported that the game retails for $5.

Xbox 360 (Prices from Inquisitr; Discount percentage from Major Nelson)

"NCAA 14" - $9.89 (67% off)

"Battlefield 4" Premium - $24.99 (50% off)

"Transformers Fall of Cybertron" - $14.99 (75% off)

"Transformers Rise of the Dark Spark" - $24.99 (50% off)

"Scott Pilgrim" - $4.99 (50% off)

"Naruto Storm R" - $24.99 (50% off)

"Dragon Ball Z Budokai HD collection" - $14.99 (50% off)

"Dark Souls II" - $19.99 (50% off)

"PES 2015" - $26.79 (33% off)

"Metal Gear Solid V: Ground Zeroes" - $6.59 (67% off)

"Thief" - $11.99 (70% off)

"Tomb Raider" - $6.59 (67% off)

"Sanctum 2" - $3.74 (75% off)

"Dungeon Defenders" - $3.74 (75% off)

"How to Survive" - $7.49 (50% off)

"Dungeons & Dragons Daggerdale" - $4.99 (50% off)

"Dungeons & Dragons Chronicles of Mystara" - $4.94 (67% off)

"State of Decay - Breakdown" - $3.49 (50% off)

"State of Decay - Lifeline" - $3.49 (50% off)

"Max Curse of the Brotherhood" - $4.94 (67% off)

"Halo Spartan Assault" - $3.39 (66% off)

"Bioshock Infinite" - $4.49 (85% off)

"Dance Central 3" - $9.89 (67% off)

Xbox 360 (Gold)

"Resident Evil 5" - $6.59 (20-67% off)

"Resident Evil 6" - $11.99 (40-50% off)

"Resident Evil Code Veronica X" - $6.59 (20-67% off)

"Resident Evil Raccoon City" - $9.99 (50-75% off)

"Resident Evil Revelations" - $13.19 (67% off)

"Skate 3" - $4.99 (75% off)

"Titanfall" Game of the Year Edition - $12.49 (75% off)

"Call of Duty: Ghosts" - $29.99 (50% off)

"Assassin's Creed IV" Season Pass - $9.99 (50% off)

"The Evil Within" - $29.99 (50% off)

Meanwhile, Cinema Blend reported that a new set of daily discounts will be available until Dec. 31. For more information about Xbox deals, head over here.

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Watch this gameplay trailer of "The Evil Within" for the PS4 and Xbox One (via CommunityGame) below.