There's only little information available e.g. on their youtube channel. Heroes started 2007 under DICE.
Beta Phase AnnouncementEdit
On the Official Website the
Early Beta Weblink (Now Broken): 
Closed Beta Phase 1Edit
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The first phase of the game release was an invitation-only closed beta and the invitations were given to professional beta testers only. The people invited are usually promoting the game and writing reviews about the game.
Following the selection of beta testers, the amount of traffic caused the site to crash for a short time. Once the website was placed back up it was revealed that third-party professional testers would be testing the game, and several open beta phases would begin in the near future. The purpose of these beta phases is to test server capacity as players download the game and whether the servers provided can handle the intense use. The current closed beta players are under a non disclosure agreement, disallowing them from releasing information about the beta.
On July 29, 2008, it was announced that Battlefield Heroes will be delayed until some time in the first 4 months of 2009. EA CEO John Riccitiello stated that the company is going "to increase its focus on some of the social networking features."
On August 29, 2008, hundreds of beta keys were given out at the EA booth at the Penny Arcade Expo on small cards to anyone in attendance.
Battlefield Heroes Closed Beta Part 1 has now ENDED. The game was shut down until the Closed Beta Phase 2. From this time on EAsy was called in life and took over Heroes.
Closed Beta Phase 2Edit
In January 2009, the Battlefield Heroes Beta Key Signup page was opened with another set of Battlefield: Heroes keys on a "first come, first served" basis. The closed beta has already started, and users may stand in queue for a beta key. On February the 6th, it was announced that the Battlefield Heroes Closed Beta Sign-Up had reached over 100,000 in participants. Players are given free Battlefunds to test out all new items!
On February 10, 2009, it was announced that the closed beta would be re-opened on the 11th of February, 2009. Many fans incorrectly assumed that thousands of beta keys would be handed out on that day, however, only testers from the first phase of the first phase were able to access the beta on that day.
On February 16, 2009, 2000 beta keys were given out to some of the fans who had signed up for the previous stage on QABoss, and an additional 2000 the next day. On February 24, it was announced that the QABoss beta keys were all handed out and have moved on to those who signed up on the site. Some fans seem to be having problems: there are still those who have signed up on QABoss and did not receive a key. DICE said that either they signed up too late or it was just a simple mistake.
On April 2, 2009, DICE sent out 50,000 new beta keys to people who registered for the beta.
The Character Wipe, Basically a restart of Heroes, was one of the Earliest Milestones.
Pirate and Martial Arts Outfits are available for the Grand Opening of the Battlefield Store.
The inclusion of the map, Coastal Clash, also introduced many features which many heroes now take for granted, like Friends, Leader-boards, Hero Profiles, Groups, Permanent Items, Redeem Codes and Player/Hero Search.
The next big content update following was Heroes Of The Fall.
Closed Beta has now ended and the game is going in the Open Beta Phase.