Here is the full list of all 31 Bloody Trapland 2: Curiosity achievements.
Open passage with button
Complete 20 levels without any deaths
Complete 10 levels without any deaths
Complete 5 levels without any deaths
Stinky unlocked
Unveil last level
Complete 3 levels without any deaths
Defeat cave boss
Find hidden entrance
Reached cave world
Find hidden coin
Defeat mnt boss
Activate hidden btn
Found hidden coin
Reached mnt world
Found hidden passage
Defeat desertboss
Picked up coin
Reached Desert world
Activate first artifact
First time on a boat
Defeat Skogstrollet
Collect first crystal
Find temple entrance
Find secret passage
Complete a level without any deaths
Open first secret door
Close encounter
Collect first coin