Here is the full list of all 30 Antihero achievements.
Kill 4 assassination contracts in a single match
Buy all guild upgrades in a single match
Get 3 victory points in a turn
Defeat Lygrave
Win a match with 2 blackmails
Get 15 gold in a single turn
Complete level 1
Defeat Mathilde
Defeat Gashford
Defeat Frannie
Complete the game
Complete all levels on Hard
Play a match online
Win a match online
Win 10 matches online
Win 100 matches online
Win 300 matches online
Win "The Wharf" online
Win "The Palace" online
Win "The Masquerade" online
Win "The Big City" online
Play an opponent who already has the Black Plague
Win an online match in 10 or fewer turns
Trap an opponent thief
Evict 12 urchins in a match
Win a match with 3 bribes
Trap your opponent 5 times in a single match
Kill a max-level gang with an assassin
Employ 2 max-level gangs simultaneously
Evict a full business that was trapped