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