both, If you own games on disc and they are on the BC list, then you can play them. Likewise with any digital purchases you've made in the past.
Gamepass is also pretty good if you can get a good deal (I managed to grab 2 years worth for £3 a month)
Available games
Current list of titles with more to come. Games are subject to change.
A- A Kingdom for Keflings
- A World of Keflings
- Age of Booty
- Alan Wake
- Alan Wake’s American Nightmare
- Alice: Madness Returns
- Alien Hominid HD
- Altered Beast
- Anomaly Warzone Earth
- Aqua
- ARKANOID Live!
- Army of Two
- Assassin's Creed II
- Assassin's Creed Revelations
- Assassin’s Creed
- Assassin’s Creed III
- Assassin’s Creed: Brotherhood
- Assassin’s Creed® Rogue
- Assault Heroes 2
- Asteroids & Deluxe
- Astropop
- Axel & Pixel
B- Babel Rising
- Band of Bugs
- Banjo Kazooie
- Banjo Kazooie: N n B
- Banjo Tooie
- Batman: Arkham Origins
- BattleBlock Theater
- Battlefield 3™
- Battlefield Bad Co.
- Battlefield: Bad Co. 2
- Battlestations: Midway
- BAYONETTA
- Beat’n Groovy
- Bejeweled 2
- Bejeweled 3
- Bellator: MMA Onslaught
- Beyond Good & Evil HD
- Bionic Commando Rearmed 2
- Bioshock
- Bioshock 2
- Bioshock Infinite
- BLACK™
- Blazing Angels
- Blood Knights
- Blood of the Werewolf
- Bloodforge
- BloodRayne: Betrayal
- Blue Dragon
- Bomberman Battlefest
- Boom Boom Rocket
- Borderlands
- Borderlands 2
- Bound by Flame
- Braid
- Brain Challenge™
- Brave: The Video Game
- Bully: Scholarship Ed
- Burnout Paradise
C- Cabela's Dangerous Hunts 2013
- Cabela’s Alaskan Adventures
- Cabela’s Survival: SoK
- Call of Duty® 2
- Call of Duty® 3
- Call of Duty®: Black Ops
- Call of Duty®: Black Ops II
- Call of Duty®: Ghosts
- Call of Duty®: World at War
- Call of Juarez® Gunslinger
- CAPCOM ARCADE CABINET
- Carcassonne
- Cars 2: The Video Game
- Cars: Mater-National
- Castle Crashers
- Castle of Illusion Starring Mickey Mouse
- Castlestorm
- Castlevania: SOTN
- Catherine
- Centipede & Millipede
- Child of Eden
- Civilization Revolution
- COD: Advanced Warfare
- Comic Jumper
- Comix Zone
- Commaders: Attack
- Condemned
- Contra
- Costume Quest 2
- Counter-Strike: GO
- Crackdown
- Crazy Taxi
- Crimson Skies®: High Road to Revenge™
- CRYSTAL DEFENDERS™
- Crystal Quest
D- D&D: Chronicles of Mystara
- Dark Souls
- Dark Void
- Darksiders
- Darksiders II
- DAYTONA USA
- de Blob 2
- Dead Rising 2: Case West
- Dead Rising 2: Case Zero
- Dead Space™
- Dead Space™ 2
- Dead Space™ 3
- Dead Space™ Ignition
- Deadfall Adventures
- Deadliest Warrior
- Deadliest Warrior: Legends
- Deadly Premonition
- Deathspank T.O.V.
- Defense Grid
- DEUS EX: HUMAN REVOLUTION
- DIG DUG
- DiRT 3
- DiRT Showdown
- Discs of Tron
- Disney Bolt
- Disney Epic Mickey 2: The Power of Two
- Domino Master
- Doom
- DOOM 3 BFG Edition
- Doom II
- Doritos Crash Course
- Double Dragon Neon
- Dragon Age: Origins
- Dragon’s Lair
- Driver San Francisco
- Duck Tales: Remastered
- Duke Nukem Manhattan Project
- Dungeon Siege III
E- E4
- Earth Defense Force 2017
- Earth Defense Force: IA
- Earthworm Jim HD
- Eat Lead
- Encleverment Experiment
- Escape Dead Island
F- F1™ 2014
- Fable Anniversary
- Fable II
- Fable III
- Fable Trilogy
- Fable® II Pub Games
- Faery: Legends of Avalon
- Fallout 3
- Fallout: New Vegas
- Far Cry 2
- Far Cry 3
- Far Cry 3® Blood Dragon
- Feeding Frenzy
- Feeding Frenzy 2
- Fighting Vipers
- Final Fight: Double Impact
- Flashback
- FLOCK!
- Forza Horizon
- Foul Play
- Fret Nice
- Frogger
- Frogger 2
- Frontlines: Fuel of War
- FunTown Mahjong
- Fuzion Frenzy®
G- Galaga
- Galaga Legions
- Galaga Legions DX
- GAROU -MARK OF THE WOLV
- Gatling Gears
- Gears of War
- Gears of War 2
- Gears of War 3
- Gears of War: Judgment
- Geometry Wars Evolved
- Geometry Wars Evolved²
- Geometry Wars™ 3: Dimensions Evolved
- Ghost Recon: Future Soldier™
- Ghostbusters
- Ghostbusters: Sanctum of Slime
- Gin Rummy
- Girl Fight
- Go! Go! Break Steady
- Goat Simulator
- Golden Axe
- Golf: Tee It Up!
- Grabbed by the Ghoulies™
- Grid 2
- Gripshift
- GTA IV
- Guardian Heroes (TM)
- Gunstar Heroes
- Guwange
- Gyromancer
- Gyruss
H- HALF-MINUTE HERO -Super Mega Neo-
- Halo 3
- Halo 3 ODST Campaign Edition
- Halo 4
- Halo Wars
- Halo: Combat Evolved Anniversary
- Halo: Reach
- Halo: Spartan Assault
- Hard Corps: Uprising
- Hardwood Backgammon
- Hardwood Hearts
- Hardwood Spades
- Harms Way
- Haunted House
- Heavy Weapon
- Hexic 2
- Hexic HD
- Hitman: Absolution
- Hitman: Blood Money
- Hydro Thunder
I- I am Alive™
- Ikaruga
- ilomilo
- Injustice: Gods Among Us
- Insanely Twisted Shadow Planet
- Interpol
- Iron Brigade
J- Jeremy McGrath’s Offroad
- Jet Set Radio
- Jetpac Refuelled
- Jewel Quest
- Joe Danger 2: The Movie
- Joe Danger Special Edition
- Joust
- Joy Ride Turbo
- JUJU
- Just Cause 2
K- Kameo
- Kane & Lynch 2: Dog Days
- Killer Is Dead
- KOF SKY STAGE
- KOF2002UM
L- Lara Croft: GoL
- Lazy Raiders
- Left 4 Dead
- Left 4 Dead 2
- LEGO Batman
- LEGO Pirates of the Caribbean: The Video Game
- LEGO Star Wars III
- LEGO Star Wars: TCS
- LEGO® Indiana Jones™
- LEGO® Indiana Jones™ 2
- Limbo
- Lode Runner
- LUMINES LIVE!
- Luxor 2
M- Mad Tracks
- Madballs Babo: Invasion
- Mafia II
- Magic 2012
- Magic 2013
- Magic 2014 — Duels of the Planeswalkers
- Magic: The Gathering
- Marlow Briggs
- Mars: War Logs
- Mass Effect
- Mass Effect 2
- Mass Effect 3
- Matt Hazard: BBB
- Medal of Honor: Airborne
- Meet the Robinsons
- MEGA MAN 10
- MEGA MAN 9
- METAL GEAR RISING: REVENGEANCE
- Metal Slug 3
- Metal Slug XX
- MGS PW HD
- Midway Arcade Origins
- Might & Magic Clash of Heroes
- Military Madness
- Mirror’s Edge
- Missile Command
- Monaco: What’s Yours is Mine
- Monday Night Combat
- Monkey Island 2: SE
- Monkey Island: SE
- MONOPOLY DEAL
- MONOPOLY PLUS
- MOON DIVER
- Motocross Madness
- Mr. DRILLER Online
- Ms. Splosion Man
- MS.PAC-MAN
- Mutant Blobs Attack
- Mutant Storm Empire
- Mutant Storm Reloaded
- MX vs. ATV Reflex
N- N+
- NBA JAM: On Fire Edition
- NEOGEO BATTLE COLISEUM
- NEW RALLY-X
- NiGHTS into dream…
- NIN2-Jump
- Ninja Gaiden Black
O- Oblivion
- Of Orcs and Men
- OF: Dragon Rising
- Omega Five
- Operation Flashpoint: Red River
- Outland
P- P4A
- Pac-Man
- Pac-Man C.E
- PAC-MAN CE DX+
- PAC-MAN MUSEUM
- Peggle
- Peggle® 2
- Perfect Dark
- Perfect Dark Zero
- Phantasy Star II
- Phantom Breaker: Battle Grounds
- Pinball FX
- Planets Under Attack
- Plants vs. Zombies
- Poker Smash
- Portal 2
- Portal: Still Alive
- Prey
- Prince of Persia
- Pure
- Putty Squad
- Puzzle Quest
- Puzzle Quest 2
- Puzzle Quest Galactrix
- Puzzlegeddon
Q- QIX ++
- Quantum Conundrum
R- R-Type Dimensions
- Radiant Silvergun
- Rage
- Rainbow Six® Vegas
- Rainbow Six® Vegas 2
- Raskulls
- Rayman 3 HD
- Rayman® Legends
- Rayman® Origins
- Red Dead Redemption
- Red Faction: Armageddon
- Red Faction: Battlegrounds
- RoboBlitz
- Rocket Knight®
- Runner2: Future Legend of Rhythm Alien
S- Sacred 3
- Sacred Citadel
- Saints Row IV
- Saints Row® The Third™
- Sam & Max Beyond Time and Space
- Sam & Max Save the World
- Samurai Shodown II
- Scarygirl
- Scrap Metal
- Screamride
- SEGA Bass Fishing
- Sega Vintage Collection: Alex Kidd & Co.
- Sega Vintage Collection: Golden Axe
- Sega Vintage Collection: Monster World
- Sega Vintage Collection: Streets of Rage
- Shadow Assault/Tenchu
- Shadow Complex
- Shadowrun
- Shadows of the Damned
- Shank™ 2
- Shinobi
- Shotest Shogi
- Shred Nebula
- Sid Meier’s Pirates!
- Silent Hill: Downpour
- Skate 3
- Skullgirls
- Skydive
- Slender: The Arrival
- Small Arms
- Sniper Elite V2
- Soltrio Solitaire
- Sonic & All-Stars Racing Transformed
- Sonic & Knuckles
- Sonic Adventure
- Sonic Adventure™ 2
- Sonic CD
- Sonic the Fighters
- Sonic The Hedgehog
- Sonic The Hedgehog 2
- Sonic The Hedgehog 3
- Sonic The Hedgehog™ 4 Episode I
- Sonic The Hedgehog™ 4 Episode II
- SOULCALIBUR
- SoulCalibur II HD
- South Park™: The Stick of Truth™
- Space Ark
- Space Giraffe
- Space Invaders: IG
- Spec Ops: The Line
- Spelunky
- Splinter Cell: Conviction
- Split/Second
- Splosion Man
- SSX
- Stacking
- Star Wars: The Force Unleashed
- Star Wars: The Force Unleashed II
- Strania
- STREET FIGHTER IV
- Stuntman: Ignition
- Super Contra
- Super Meat Boy
- SUPER STREETFIGHTER IV ARCADE EDITION
- Supreme Commander 2
- SVC: ToeJam & Earl
- Syberia
T- TEKKEN 6
- Tekken Tag Tournament 2
- Texas Hold’em
- The Cave
- The Darkness II
- The King of Fighters 98
- The Maw
- The Orange Box
- The Splatters™
- The Walking Dead
- The Walking Dead: Michonne - Episode 1
- The Walking Dead: Season Two
- The Witcher 2: Assassins of Kings
- Ticket to Ride
- TimeShift
- Tomb Raider Underworld
- Torchlight
- Tour de France
- Tour de France 2009
- Tower Bloxx Deluxe
- Toy Soldiers
- Toy Soldiers Cold War
- Toy Story 3
- Trials HD
- Triggerheart Exelica
- Trine 2
- Tron: Evolution
U- Ugly Americans: Apocalypsegeddon
- Unbound Saga
- Undertow
V- VANQUISH
- Virtua Fighter 2
- Virtua Fighter 5 Final Showdown
- Virtual-On OT
- Viva Piñata
- Viva Piñata: Trouble in Paradise
W- Winterbottom
- Wolfenstein 3D
- Word Puzzle
- WOTB: Commando 3
X- XCOM®: Enemy Unknown
- XCOM®: Enemy Within
Y- Yosumin! LIVE
Z- Zuma
- Zuma's Revenge!
Yeah it's a pretty impressive list! I've got a lot of stuff that I used to love playing that I'd really like to have a go on again, so that definitely swings it to the XBox for me! And Game Pass sounds awesome too!
