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