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