I know there is a challenge to kill at least one of each monster and then a more tedious one of killing only one of each monster.
However is there a challenge that states: Collect all the guaranteed artifacts?
Black torc
Death's Sting
5 Orbs
Sceptre of Chaos
Trident of the red rooster
Rune-covered trident
Needle
Sting
Crown of Science
Si
Rolf's Companion
Potion of Literacy
Phial of Caladriel
Ring of the High King
Big Punch
Sword of Nonnak
Elemental Gauntlets
Weird Tome
Crown of Chaos
Amulet of Chaos
Shield of Raw Steel
Amulet of Raw Steel
True Strenght
Axe of the Minotaur Emperor
Boots of Great Speed
Moonsickle
Ancient Mummy Wrapping
Ankh
Ring of the Master Cat
Rolf's Saviour
That is 34, am I missing anything?