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