Middle-earth: Shadow of Mordor has already released on PC's. It is an action role-playing video game set in The Lord of the Rings universe. Plenty of collectibles can be found in game. There are 42 Strange Artifacts that you can find all over the game's map and this guide will help you find them.
Durthang Outskirts
Grog Bowl
Head to the southernmost ruin when you see two ruins in that area. You can find the artifact in a small grotto, along the edge of the map where yo can squeeze through the corner of the ruin.
Uldun Crossing
Pickaxe
In the southwest area you will locate the cave. Go inside the cave and break the wall with an elfshot to find the artifact.
Barrows of Uldun
Coded Journal Entry
Head to the northeast area of the map you will see a bridge. Climb the tower from the eastern end of the bridge and find the artifact on top.
Serpentine Blade
To find this artifact you will have to go inside a deep, Orc-filled cave on the western edge of the map. It's better to just sprint past everyone take the artifact and sprint back out.
Durthang Keep
Rusted Horn
Go to the northwestern side of the map, its like one giant ruin area. Artifact is inside the small cell, to go there walk along the eastern edge of the ruin while heading south to spot a bent set of bars you can squeeze past.