Mass Effect Legendary Edition

This is the list of all possible worlds you can do to get 5 completed missions for this achievement. The extra DLC firewalker and explore the original Normandy missions included in this edition count towards this achievement as well.

Cluster -- System -- Planet -- Mission Name -- Found/Scan

Caleston Rift -- Solveig -- Sinmara -- Endangered Research Station -- Scanned
Caleston Rift -- Talava -- Taitus -- Mining The Canyon -- Scanned
Crescent Nebula -- Lusarn -- Tarith -- Blood Pack Communications Relay -- Complete Patriarch and Deliver Datapad assignments for Aria on Omega
Crescent Nebula -- Zelene -- Helyme -- Captured Mining Facility -- Scanned
Eagle Nebula -- Amun -- Neith -- Wrecked Merchant Freighter -- Scanned
Eagle Nebula -- Strabo -- Jarrahe Station -- Abandoned Research Station -- After Neith
Hourglass Nebula -- Faryar -- Daratar -- Eclipse Smuggling Depot -- Scanned
Hourglass Nebula -- Ploitari -- Zanethu -- Estevanico -- Scanned
Minos Wasteland -- Fortis -- Aequitas -- Abandoned Mine -- Scanned
Omega Nebula -- Arinlarkan -- MSV Strontium Mule -- MSV Strontium Mule -- After Joab
Omega Nebula -- Fathar -- Lorek -- Lost Operative -- Emailed to you
Pylos Nebula -- Dirada -- Canalus -- Anomalous Weather Detected -- Scanned
Rosetta Nebula -- Enoch -- Joab -- Archeological Dig Site -- Scanned
The Shirke Abyssal -- Xe Cha -- Zada Ban -- Blood Pack Base -- After Tarith
Sigurd's Cradle -- Decoris -- Sanctum -- Blue Suns Base -- After MSV Strontium Mule
Sigurd's Cradle -- Skepsis -- Franklin -- Javelin Launch -- Emailed to you
Titan Nebula -- Haskins -- Capek -- Hahne-Kedar Facility -- After Jarrahe Station

Simply scan a probe onto the anomaly location and complete the mission to get progress. You can track your progress in Shepards personal terminal in his Captain Quarters on the Normandy.