While Mass Effect 2's in-game DLC pipeline, The Cerberus Network, continues to transport new weapons (and soon, a new vehicle) to players for free, BioWare has announced the game's first pack of paid downloadable content. "Kasumi's Stolen Memory" finally completes Commander Shepard's dirty dozen, adding a confident female thief to your anti-Reaper repertoire. It's currently scheduled to launch for Xbox 360 and PC on April 6th.

After downloading the DLC, players can get in touch with Kasumi on the Citadel, either in the middle of an ongoing Mass Effect 2 game or after the completion of the main story (lesson learned from Mass Effect 1 DLC!). Once recruited, Shepard aids Kasumi on a secretive mission of recovery, which requires a suave disguise and a run-in with an influential and predictably corrupt art collector. The content, which also provides the "Locust" SMG, a flash-bang grenade loyalty power and a new Achievement, should take about an hour and a half to complete.

BioWare is currently in the midst of "internal discussion" to determine the price of the DLC, but we'll keep you updated as soon as it's finalized. Look for some impressions of "Kasumi's Stolen Memory" on Joystiq later today. Spoiler: It looks great.