Here is the full list of all 55 Zeepkist achievements.
The base game contains 1 achievement, and there are 5 DLC packs containing 54 achievement.
You won an online match!!
You won 5 online matches!!
You won 10 online matches!!
You won 25 online matches!!
You won 50 online matches!!
You won 100 online matches!!
You won 1337 online matches!!
Play online multiplayer with a Steam friend!
Play online multiplayer with 2 Steam friends!
Play online multiplayer with 3 Steam friends!
Play online multiplayer with 4 Steam friends!
Upload a level to the Steam workshop!
Open the Zeepkist level editor!
Validate a level in the level editor!
Place your first block in the level editor!
Plant a tree using the tree gun in the level editor!
Paint a block in the level editor!
Play Zeepkist in October
Play Zeepkist on Halloween at midnight (local time)
Play Zeepkist on Sinterklaas day, December 5th!
Play Zeepkist on the Belgian Sinterklaas day, December 6th!
Play Zeepkist on New Year's Eve at midnight! (local time)
Play Zeepkist on Yannic's birthday and Zeepkist's Early Access launch day!
You won 200 online matches!!
You won 300 online matches!!
You won 400 online matches!!
You won 500 online matches!!
You won 600 online matches!!
You won 700 online matches!!
You won 800 online matches!!
You won 900 online matches!!
You won 1000 online matches!!!!
Happy birthday King Willy!!
You won 2000 online matches!!
You won 3000 online matches!!
You won 4000 online matches!!
You won 5000 online matches!!
Hehehehe