Here is the full list of all 17 Triplicity achievements.
Find all the secret treasures
Complete the Gold challenge
Press each link in the 'Credits' menu (and follow them if you like this game :D)
Win 3 Standard Tournaments
Complete the Silver challenge
Complete the Bronze challenge
Complete the Gray challenge
Win a match without loosing any life
Complete the White challenge
Complete the Black challenge
Complete the Blue challenge
Complete the Red challenge
Complete the Green challenge
Win 15 Standard Tournaments
Win 3 Draft Tournaments
Win 15 Draft Tournaments
Collect all cards in the game