There's a new map called 'Fortress Frenzy' set on a small island, with bridges the only means on or off. They're also "expanding their mission system" and add treasure chests.
Special rewards can be earned from these Treasure Chests which drop at random after killing an enemy. Battlefield Heroes is the cartoonish spin off to DICE's usually series Battlefield.
"Also part of this anniversary celebration, Battlefield Heroes is expanding their mission system with more opportunities to earn Valor Points and Experience Points as well as introducing the Treasure Chest to give players special rewards that appear at random upon killing an enemy," blurbed the EA press release.
Login between June 25th and July 1st to get your two free Party Packs: "one Royal and one National. Each Party Pack will include a Battlefield Heroes Birthday Shirt, a Tricycle Emote that lasts for 3-days and a new Treasure Chest Key." Simply visit the , login, and then hit the My Stuff menu for Rewards.
Battlefield Heroes is browser-based and free-to-play.