Here is the full list of all 18 Duck Game achievements.
Break 10 draws.
Win 10 online matches.
Play through a match that goes to 50 points.
Win a round in a 4 player match by converting all players to your team.
Play on 10 different custom maps.
Finish 50 whole games.
Spawn 1000 times.
Kill 1000 ducks with any one profile.
Spawn 100 times.
Get best trophy in all challenges.
Unlock the arcade basement.
Crush 50 ducks.
Spend 15 minutes on fire with any one profile.
Win a round while standing on a mine.
Kill 3 ducks at the same time with the Death Ray.