Assignments are the name given to side missions in Mass Effect 2. Assignments DO NOT advance the main story, but completing them can help the player understand the inner workings of the game's universe, the interactions between Races, etc
All Assignments in Mass Effect 2
N7
These become available after completing Freedom's Progress
N7: Abandoned Research Station
N7: Eclipse Smuggling Depot
N7: Hahne-Kedar Facility
N7: Lost Operative
N7: MSV Estevanico
N7: Wrecked Merchant Freighter
These become available after completing Horizon
N7: Abandoned Mine
N7: Anomalous Weather Detected
N7: Archeological Dig Site
N7: Blood Pack Base
N7: Blood Pack Communications Relay
N7: Blue Suns Base
N7: Captured Mining Facility
N7: Endangered Research Station
N7: Imminent Ship Crash
N7: Javelin Missiles Launched
N7: Mining the Canyon
N7: MSV Strontium Mule
N7: Quarian Crash Site
Illium
Illium: A Troublemaker
Illium: Blue Rose of Illium
Illium: Conrad Verner
Illium: Gianna Parasini
Illium: Indentured Service
Illium: Medical Scans
Illium: The Assassin: Salarian Family Data
Illium: The Justicar: Smuggling Evidence
Illium: The Justicar: Stolen Goods Found
Illium: The Prodigal: Lost Locket Found