Fresh & Updated List of Games that supports Next-Gen API's: Mantle/DX12/Vulcan
Mantle Titles:
BF: 4
BF: Hardline
Thief
Civilization: Beyond Earth
Dragon Age™: Inquisition
Plants vs. Zombies™ Garden Warfare
Sniper Elite 3 by Rebellion Developments
Star Citizen by Roberts Space Industries (Mantle & DX12 API's + DX11)
DX12 Titles:
Almost all Games on XBoX 1 runs in DX12, many will come to the PC Win_X
Heroes & Generals
Rust
Ashes of the Singularity
Descent: Underground
Squad (DirectX 12 patch is in the works)
Survarium (DirectX 12 patch is in the works)
Caffeine
The Elder Scrolls Online (DirectX 12 patch is in the works)
Star Wars Battlefront (First DirectX 12 game to run on the XBox 1)
Rise of the Tomb Raider
Gears of War Ultimate Edition
Hitman
Quantum Break
Forza Motorsport 6: Apex
Total War: Warhammer
Upcoming:
Deus Ex: Mankind Divided
Forza Horizon 3
W.N.C: Infantry
Gears of War 4
Battlefield 1
Civilization VI
Watch Dogs 2
Ark: Survival Evolved (DirectX 12 patch is in the works)
Forge - Halo 5: Guardians Edition
Halo Wars 2
King of Wushu
Wolcen (propably will use DX12 in CryEngine 5.1)
Mass Effect: Andromeda (not confirmed yet)
All New StarWars Games from EA will have DX12 (kinda confirmed)
VULCAN Titles:
The Talos Principle
Dota 2
Doom IV (Bethesda already confirmed that more games will support Vulcan in the future)
Games Creo Engines:
FrostBite: fully supports DX12
CRYengine 5: fully supports DX12
UE 4: Partially supports DX12/Vulcan, full support soon.
