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.
Play on any gamemode on expert difficulty
Play on any gamemode on hard difficulty
Upload A score to the leaderboards
Play on any gamemode on medium difficulty
Play on any difficulty in classic
Play on any difficulty in marathon
Crack 5 passwords in any gamemode
Play on any gamemode on easy difficulty
Play on any difficulty in practice
Hack a total of 100 passwords
Hack a total of 1000 passwords