Here is the full list of all 16 ENCODYA achievements.
Finish the game in less than 3.5 hours
Discover 10 Secrets
Uncover the Octopi plan
Finish the game
Finish the game with less than 5 hints
Finish the game without hints
Complete Part 4
Listen to the mysterious echo
Discover 7 Secrets
Complete Part 3
Find a vantage point to see the landscape
Complete Part 2
Discover 5 Secrets
Discover 3 Secrets
Complete Part 1
Get a Fly Bus Ticket