Here is the full list of all 42 Hacktag achievements.
Reach level 10
Complete 10 missions with a better score than you partner
Complete 10 missions as the Hacker
Earn 10 S ranks
In one mission, set your partner free 3 and get liberated 3 times
Complete a mission without getting caught
Start a mission with three skills selected
Hack 1 boss computer in the boss takedown missions
Successfully complete your first mission online as the Stealth-agent
Get your first S rank as a Stealth-agent
Steal 1 Tb of confidential datas
Level-up for the first time
Successfully complete your first mission online as a Hacker
Get your first S rank as a Hacker
Complete a mission with a better score than you partner
Set your partner free for the first time
Play online with a partner
Finish the tutorial
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
Enjoy 10 nice and platonic cups of coffee
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
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
Use every skills once in a completed mission
Play the local mode with partner
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