Here is the full list of all 11 Terminal Hacker achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
Hack a total of 1000 passwords
Play on any gamemode on hard difficulty
Hack a total of 100 passwords
Crack 5 passwords in any gamemode
Upload A score to the leaderboards
Play on any gamemode on expert difficulty
Play on any gamemode on medium difficulty
Play on any gamemode on easy difficulty
Play on any difficulty in practice
Play on any difficulty in classic
Play on any difficulty in marathon