Activision community manager Dan Amrich has announced that Transformers: Fall of Cybertron multiplayer will permanently increase XP rewards by 100% for the rest of the game's life cycle.
According to the blog, "You heard right. Straight from the game’s official account on Twitter, as of this morning: @fallofcybertron – multiplayer XP set to 2X – 4EVER! Get in and level up now! #2xp4EVER"
Back in late 2011, developer High Moon did the same for War for Cybertron as well.
Transformers: Fall of Cybertron was released last August 2012 for PC, Xbox 360 and PlayStation 3.