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