The Battlefield: Hardline Multiplayer beta has been confirmed to begin on February 3rd 2015, and will be available to play on PS4, Xbox One, PS3, Xbox 360, and PC. The beta will last until February 8th, and will give players access to three modes on three of the multiplayer maps.
There is no need to register for the beta as it will be public and open to anyone who wishes to take part. The beta will give the developers one last chance to improve the game’s experience and address any online issues before the game’s release on March 17th 2015.
Playable maps include Dust Bowl, Downtown, and Bank Job, while the multiplayer modes include Conquest, Heist, and Hotwire. Battlefield 4 players taking part in the Hardline beta will receive an exclusive Hardline Dog Tag (in-game item) to wear in Battlefield 4.
PC, PS4 and Xbox One supports 64 players on Conquest and 32 players for Hotwire and Heist. On PS3 and Xbox 360, all modes support a maximum of 24 players.
Source: Battlefield.com