The Episode 4: Tower of Visions Add-on for Adera (Win 8) has 6 achievements worth 100 gamerscore.
Find your way into Amaro's tower.
Enter Amaro's hidden library.
Reveal the contents of the secret note inside Amaro's library.
Build Amaro's flying machine and escape the tower.
Find all landmarks through the observatory telescope in under two minutes.
Line up all the planets in the celestial observatory in 15 moves or less.