Here is a list of all the maps and modes that will be accessible to Free Access players:
6v6 Core Maps: Farm 18, Shoot House, Shipment, Dome, Himmelmat Expo, Pelayo’s Lighthouse
6v6 Modes: Team Deathmatch, Hardpoint, Domination, Kill Confirmed, Grind, Gun Game, Infected, One in the Chamber, All or Nothing
Gunfight Maps: Alley, Blacksite, Exhibit, Shipment
Battle Maps: Santa Seña
Battle Map Modes: Ground War, Invasion
Modern Warfare II Multiplayer Free Access begins on April 19 at 10 AM PT and ends on April 26 at 10 AM PT. An additional download is required to play. See your platform for details on file size.
Also, for those who own the game already, remember to tell your Warzone 2.0 friends that they can join you in Modern Warfare II during Free Access!