Here is the full list of all 31 Trapper's Delight achievements.
Get 25% of all of the Challenge stars
Get a star in a Challenge level
Destroy at least 4 traps with a single Bomb
Collect 10 Coins
Get 10 Arrow Trap Kills
Collect 100 Coins
Die 100 times
Get 10 kills with Fireball Traps
Get 20 kills with Flipper Traps
Get 10 kills with Acid Traps
Get 10 kills with Hidden Jump Traps
Get 15 kills with Hidden Lava traps
Get 5 Jump Trap Kills
Get 10 Moving Saw Kills
Get 10 Grinder Kills
Get 20 Shuriken Kills
Play an online game with 3 people on your friends list.
Take 10000 Steps
Get 15 Timed Pit kills
Get 15 kills with Triple Ice trap
Get 15 kills with Wall Spikes
Win an online game of Trapper's Delight
Win 10 online games
Kill another player with a Bomb
Play a 4 player local multiplayer game
Get 10 Hammer Kills
Upload a level to the Steam Workshop
Complete all of the Challenge levels
Get 50% of all of the Challenge stars
Get all of the Challenge Stars
Get 10 stars in Workshop / Community Challenge levels