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