Here is the full list of all 23 Lost Artifacts - there are Ancient Tribe Survival achievements.
For collecting all trophies
For defeating the Dark Priest
For completing all levels with 3 stars
For the Seventh Totem
For the Sixth Totem
For the Fifth Totem
For the Fourth Totem
For the Third Totem
For stopping time
For restoring the signal fires
For the Second Totem
For completing 15 levels with 3 stars
For restoring Stonehenge
For inflating the boat
For activating an altar
For speeding up construction
For defeating the Evil Savage
For the First Totem
For speeding up archaeologists
For completing 5 levels with 3 stars
For restoring a plant
For constructing a building
For clearing one roadblock