Here is the full list of all 18 Duck Game achievements.
Spawn 1000 times.
Win 10 online matches.
Kill 1000 ducks with any one profile.
Play on 10 different custom maps.
Win a round while standing on a mine.
Spawn 100 times.
Get best trophy in all challenges.
Play through a match that goes to 50 points.
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.
Kill 3 ducks at the same time with the Death Ray.
Finish 50 whole games.