Here is the full list of all 24 Overruled! achievements.
Big head mode. Stack 3 headhunter skulls. (Multiplayer)
Over...meh you get the point. Play 150 Overruled! cards. (Multiplayer)
A penny saved. Collect 1000 coins. (Multiplayer)
GG easy. Win a game by 500 points or more. (Multiplayer)
Survival. Be the only person alive, standing in the hill. (Multiplayer)
POW! Right in the kisser. Land 500 melee attacks. (Multiplayer)
You’re a survivor. Go an entire game without dying. (Multiplayer)
Dying is the new meta. Win a game after dying 20 times. (Multiplayer)
You used to be cool. Play 3 Overruled! cards in one game. (Multiplayer)
News just in: That guy hates you. Play the Swag Bag card when somebody else is holding the bag. (Multiplayer)
Hah, know-it-all. Win 50 games on 5 different levels, for a total of 250 wins. (Multiplayer)
Streak is not a verb! Win 5 games in a row. (Multiplayer)
Kill 50 Swag Bag carriers. (Multiplayer)
Drop it. Kill 3 Swag Bag carriers in one game. (Multiplayer)
Pretty Grim. Kill 10 players while the 10 second respawn card is active. (Multiplayer)
Pacifist. In one game, disable both melee and ranged attacks. (Multiplayer)
Disable team mode twice in one game. (Multiplayer)
Obtain a gold trophy in each of Indie's challenge levels. (Challenges)
Obtain a gold trophy in each of Sasol's challenge levels. (Challenges)
Obtain a gold trophy in each of Bunny's challenge levels. (Challenges)
Obtain a gold trophy in each of Judge's challenge levels. (Challenges)
Obtain a gold trophy in each of Motherlover's challenge levels. (Challenges)
Obtain a gold trophy in each of Anti-Hero's challenge levels. (Challenges)
Obtain a gold trophy in each of WereWanda's challenge levels. (Challenges)