Here is the full list of all 20 Portal of Evil: Stolen Runes Collector's Edition achievements.
Unlock all achievements
Find all the letters from grandpa
Spend less than a minute on a hidden object scene
Find the first letter from grandpa
Complete all mini-games without a single skip
Complete the game (Expert mode)
Complete the bonus level
Complete three mini-games in a row without a skip
Visit all worlds
Insert three seals into the gate
Complete all hidden object scenes without hints
Free the priest from the Mayan tribe
Insert the first seal into the gate
Overcome the beast
Encounter the beast
Spend less than a minute on a mini-game
Complete three hidden object scenes without hints
Find three items in three seconds
Go through the portal
Make less than five mistakes in a hidden object scene