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