Here is the full list of all 21 Ancient Stories: Gods of Egypt achievements worth 1,000 gamerscore.
Complete Pyramid 5 and slay its boss
Destroy 25000 tokens
Complete level 100
Complete Pyramid 4 and slay its boss
Complete level 72
Complete Pyramid 3 and slay its boss
Destroy 10000 tokens
Restore all statues
Complete Pyramid 2 and slay its boss
Complete level 30
Destroy 5000 tokens
Complete Pyramid 1 and slay its boss
Use any magic 100 times
Use any magic 50 times
Use any magic 10 times
Destroy 1000 tokens
Complete level 10
Restore three statues
Restore one statue
Stay idle for 5 minutes
Complete level 1