Unlock 15 new Mass Effect 2 codex entries
The Codex is the database of information about the Mass Effect universe. You can find it in the start menu. To unlock new entries, examine things in the environment when prompted and use the ‘investigate’ tab during conversations.
As long as you investigate everything you see within the first few mission you shouldn’t have any issues finding the codex. You may unlock this without paying attention, as you will earn most codex entries from conversations.