Here is the full list of all 12 Path To Gaea achievements.
Found 50% of the crystals.
Found 100% of the crystals.
Your first kill.
Ouch!
Spikes down there!
Leave the birds alone!
Time to slay dragon's!
You can't run!
Finished the game.
Found the special fish!
Solve level 23 under 2.5 minutes.
Solve level 11 under 3 minutes.