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
Complete level 100
Complete Pyramid 4 and slay its boss
Destroy 25000 tokens
Complete level 72
Complete Pyramid 3 and slay its boss
Complete Pyramid 2 and slay its boss
Destroy 10000 tokens
Use any magic 100 times
Complete level 30
Destroy 5000 tokens
Restore all statues
Use any magic 50 times
Complete Pyramid 1 and slay its boss
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