EA Access is a subscription-based gaming service by Electronic Arts. It allows users to pay USD $4.99/month, or USD $29.99/year to access 50+ games available in The Vault for as long as you want until your subscription ends.
Members also get to play new EA games before they’re released for a limited time and enjoy a 10% discount on all EA digital purchases on Xbox One. Read the official FAQ here to learn more about this service.
Here are the full 50+ games list available via EA Access:

• Battlefield 3
• Battlefield 4
• Battlefield 1
• Battlefield: Bad Company 2
• Battlefield Hardline
• Bejeweled 2
• Bejeweled 3
• Dead Space
• Dead Space 2
• Dead Space Ignition
• Dead Space 3
• Dragon Age: Inquisition
• EA Sports UFC
• EA Sports UFC 2
• Feeding Frenzy
• Feeding Frenzy 2
• FIFA 15
• FIFA 16
• FIFA 17
• Heavy Weapon
• Madden NFL 15
• Madden NFL 16
• Madden NFL 17
• Madden NFL 25
• Mass Effect
• Mass Effect 2
• Mass Effect 3
• Mass Effect: Andromeda
• Mirror’s Edge
• Mirror’s Edge Catalyst
• NBA Live 15
• NBA Live 16
• NHL 15
• NHL 16
• NHL 17
• Need for Speed
• Need for Speed Rivals
• Peggle 2
• Plants vs. Zombies
• Plants vs. Zombies: Garden Warfare
• Plants vs. Zombies: Garden Warfare 2
• Rory McIlroy PGA Tour
• Skate 3
• SSX
• Star Wars Battlefront (includes all DLCs)
• Titanfall
• Titanfall 2
• Unravel
• Zuma
• Zuma’s Revenge