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