Here is the full list of all 42 Hacktag achievements.
Finish the tutorial
Earn 10 S ranks
Enjoy 10 nice and platonic cups of coffee
Level-up for the first time
Get your first S rank as a Hacker
Get your first S rank as a Stealth-agent
Complete a mission with a better score than you partner
Steal 1 Tb of confidential datas
Start a mission with three skills selected
Hack 1 boss computer in the boss takedown missions
Set your partner free for the first time
Play the local mode with partner
Finish or witness a Lexyk Story
Finish or witness a C.L.A.W Media Story
Finish or witness a Genethics Story
Finish or withess the end of a story from each 3 corporations
Leave a corporation unpunished
Remain neutral
Reveal all the secrets of a corporation
Reach level 10
Successfully complete your first mission online as a Hacker
Successfully complete your first mission online as the Stealth-agent
Set your partner free less than 1 second before the end
Save your partner by slaming a door 20 times
Deactivate 20 times an antivirus while it was putting your hacker in quarantine
In one mission, set your partner free 3 and get liberated 3 times
Deactivate an alarm less than one second before the end
Create 50 diversions as the hacker
Complete a mission in less than 5 minutes
Complete a mission with your partner in jail
Play the same mission again and do a better score
Complete a mission with an alarm on
Complete a mission without getting caught
Use every skills once in a completed mission
Complete 10 missions with a better score than you partner
Play online with a partner
Complete 10 missions as the Hacker
Complete 10 missions as the stealth-agent
Steal 20 Tb of confidential datas
Hack 20 boss computer in the boss takedown missions
Fully customize your character
Earn all the Hacktag Trophies