Harmonix announced the development of a new free-to-play game at PAX East in Boston today called Record Run. Described by the developer as a "rhythm-runner," the game is "coming soon" to as-yet-undetermined mobile platforms.

Record Run features gameplay that compares to Gaijin Games' Bit.Trip series, according to Harmonix head Alex Rigopulos. The game uses songs from players' mobile devices as the backdrop for its levels, which features a character running down a sidewalk, avoiding obstacles and collecting music records, all seen during Rigopulous' presentation. He noted that Harmonix has "lots of other irons in the fire on mobile" aside from Record Run. [Image: Harmonix]