Like the PS5 list I'm gonna keep this list updated, let me know if I'm missing anything or if there's any errors. Brackets specify publisher followed by platforms for titles with any exclusivity. If there's no brackets or other platforms listed then the game is available everywhere.
Confirmed Launch XS Games:
Confirmed Holiday XS Games:
Exclusive titled Beyond Holiday:
Number of confirmed full exclusives: 0
Number of confirmed XB1 & XS only: 1
Number of confirmed XS & PC only: 8
Number of confirmed XB1, XS & PC only: 5
Total announced new titles with level of exclusivity: 14
Confirmed Launch XS Games:
- Tetris Effect Connected (indie) Also on XB1, PC and PS4, PS5 summer 2021
- The Falconeer (Wired Productions) Also on XB1, PC
- Yakuza Like a Dragon (Sega) Also on PS4, XB1, PC then PS5 at a later date
- Devil May Cry 5 Special Edition (Capcom) Also on PS5
- Dirt 5
- AC Valhalla
- Watch Dogs Legion
- Destiny 2
- NBA 2K21
- Just Dance 2021
- Call of Duty Black Ops Cold War *13th Nov 3 days after launch
- Observer System Redux
- Man Eater
- Marvel's Avengers
- Selection of next gen upgrades from microsoft, including: Gears 5, FH4, Ori, Gears Tactics, Sea of Thieves, Tell Me Why, The Outer Worlds
- Backwards compatibility with all XB1 titles and select Xbox and 360 titles
Confirmed Holiday XS Games:
- The Medium (Bloober Team) Also on PC (Dec 10th)
- Borderlands 3 Next Gen Upgrade
- Chivalry 2
- Crossfire X (Remedy) Also on XB1
- Dragon Quest XI S
- Planet Coaster Console Edition
- The Ascent (Curve Digital) Also on XB1, PC
- Exo One (indie) Also on PC
- Madden 21
- Immortals Fenyx Rising
- Fifa 21
Exclusive titled Beyond Holiday:
- As Dusk Falls (Microsoft) Also on XB1, PC
- Avowed (Microsoft) Also on PC
- Echo generation (cococumber) Also on XB1, PC
- Everwild (Microsoft) Also on PC
- Exomecha (Twisted Red) Also on XB1, PC
- Scorn (Ebb Software) Also on PC *note might be a launch title some sites are saying it is but there's no official date announced at all
- Fable (Microsoft) Also on PC
- Forza Motorsport (Microsoft) Also on PC
- Halo Infinite (Microsoft) Also on XB1, PC
- Psychonauts 2 (Microsoft) Also on PS4, XB1, PC
- State of Decay 3 (Microsoft) Also on PC
- Hellblade 2 (Mircosoft) Also on PC
Number of confirmed full exclusives: 0
Number of confirmed XB1 & XS only: 1
Number of confirmed XS & PC only: 8
Number of confirmed XB1, XS & PC only: 5
Total announced new titles with level of exclusivity: 14