Proto:Battlefield 4

Battlefield 4 Alpha
The earliest version of Battlefield 4 that was leaked after E3. This version was mainly played by Youtube Celebrities at DICE Headquarters in Los Angeles, California.

Differences

 * Everything is unlocked from the start, including weapons, camos, and vehicle upgrades. Even camos that were later released as Premium-only Camos, such as KLMK.
 * Only one level is playable: Paracel Storm.
 * Usernames are defaulted to the squad name and a certain number [i.e Bravo (1-5)] and the clan tags default to the team the player is on.
 * Ranks are reset when a new round starts.
 * The only grenade is the M67 frag grenade.

Battlefield 4 Private/Open Beta
This Particular Version was made playable from March 3rd-14 via Xbox Live Arcade, Playstation Network, and Origin. Owners of Medal of Honor: Warfighter Gold Edition or Battlefield 3 Premium would get 2 days early access.

Differences

 * Again, only 1 playable map in the Beta: Siege of Shanghai
 * 3 gamemodes to choose from: Conquest, Obliteration, and Domination.
 * Only 2 of each weapon can be obtained, and players can only reach rank 10 in the Beta.
 * Said weapons being the SCAR-H and AK-12 for Assault Rifles, AK-5C and ACW-R for Carbines, P226 and M9 for Sidearms, U-100 MK5 and Type 88 for LMGs, MX4 and UMP-45 for PDWs, CS-LR4 and M40A5 for Sniper Rifles, QBS-09 and 870 MCS for Shotguns, MK11 Mod 0 and RFB for DMRs, and RPG-7V2 and FIM-92 for Rocket Launchers.
 * In the Domination Gamemode, there was an M82A3 CQB by the store at Objective A, which was soon after replaced with an M32 MGL.