Here is the full list of all 51 Ancient Relics - there are Egypt achievements.
Collect 120 gold nuggets
Collect 510 gold nuggets
Collect 850 gold nuggets
Collect 350 golden tiles
Collect 1000 golden tiles
Collect 1940 golden tiles
Play 5 levels in a row
Play 14 levels in a row
Play 25 levels in a row
Buy 1 buildings
Buy 7 buildings
Buy 14 buildings
Explode 6 TNT barrels
Explode 18 TNT barrels
Explode 32 TNT barrels
Use the Scarab power-up 5 times
Use the Scarab power-up 10 times
Use the Scarab power-up 20 times
Find 3 building blueprints
Find 8 building blueprints
Find 14 building blueprints
For being the Top Score in 5 levels
For being the Top Score in 32 levels
For being the Top Score in 60 levels
Collect 4 chests
Collect 20 chests
Collect 80 chests
Play 2 days in a row
Play 5 days in a row
Play 8 days in a row
Destroy 60 sand obstacles
Destroy 190 sand obstacles
Destroy 260 sand obstacles
Break 20 ice cubes
Break 60 ice cubes
Break 120 ice cubes
Break 12 lava stones
Break 28 lava stones
Break 54 lava stones
Complete 20 new levels
Complete 45 new levels
Complete 90 new levels
Use Lightning power-up 5 times
Use Lightning power-up 12 times
Use Lightning power-up 20 times
Destroy 50 metal tiles
Destroy 130 metal tiles
Destroy 190 metal tiles
Collect 9 keys
Collect 20 keys
Collect 45 keys