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 grail.
Find the long lost golden talisman.
Clear all caves.
Hard to find and almost out of reach.
Pocket 2500 coins.
Find the long lost golden crown.
Collect all SIGI's.
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.