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