Certain tools are required to open doors.
You can only get all Nostromo Log after this point. You get the level 3 access tuner in Mission 15. The reason for doing it this way is that you need all of the tools that are unlocked later in the game. Simply load Mission 16, and ignore the main objective. You should get the first eight Nostromo Logs in Free Roam during Mission 16. Use the mission selection to obtain any missed collectibles. Thus, you do not need to collect them again if you die. The Nostromo Logs are saved automatically when you collect them up. Each Nostromo Log has its own name, which allows you to easily keep track of which ones are missing. You can view which Nostromo Logs you have collected under the map menu. Collect all 10 Nostromo Logs to get the 'Archivist' achievement. Search the indicated locations to find all 10 Nostromo Logs. The ID Tags are saved automatically when you collect them up. Each ID Tag has its own name, which allows you to easily keep track of which ones are missing. You can view which ID Tags you have collected under the map menu.
Collect all 50 ID Tags to get 'The Taken' achievement. Search the indicated locations to find all 50 ID Tags.
