Irrational Games has a few job openings that suggest an unannounced multiplayer shooter is in the works at their Boston studio (Project Icarus perhaps?). They have posted openings for a Multiplayer Level Designer "familiar with the current state of the art in game design across a wide range of genres on both PC and console," a programmer with "experience with Unreal Engine technology," and a level builder with "experience creating first-person levels using Unreal, Quake, Half-Life or similar technologies for commercial titles (this must be demonstrated through actual levels created for these engines)." Thanks Blend Games.