Here is the full list of all 17 Sigi - there are A Fart for Melusina achievements.
In under 30 minutes?
Find the long lost golden talisman.
Hard to find and almost out of reach.
Find the long lost golden grail.
Clear all caves.
Collect all SIGI's.
Pocket 2500 coins.
There she goes again.
Defeat Ivan Stinkup.
Find the long lost golden crown.
An apple a day...
Defeat Kolles Terrol.
Defeat the Steel Horse.
Kill 100 Zombies.
Collect 1000 coins.
Defeat Blind John
Fart at Melusina.